Search

Richard K. Chang

Examiner (ID: 15304, Phone: (571)270-3368 , Office: P/2464 )

Most Active Art Unit
2464
Art Unit(s)
2663, 2464, 2616
Total Applications
302
Issued Applications
252
Pending Applications
10
Abandoned Applications
46

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 18222355 [patent_doc_number] => 20230061349 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-03-02 [patent_title] => VARIABLE OUTLET GUIDE VANES [patent_app_type] => utility [patent_app_number] => 17/412222 [patent_app_country] => US [patent_app_date] => 2021-08-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 15047 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 223 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17412222 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/412222
Variable outlet guide vanes Aug 24, 2021 Issued
Array ( [id] => 17259448 [patent_doc_number] => 20210372433 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-12-02 [patent_title] => VARIABLE GEOMETRY DIFFUSER HAVING EXTENDED TRAVEL AND CONTROL METHOD THEREOF [patent_app_type] => utility [patent_app_number] => 17/399956 [patent_app_country] => US [patent_app_date] => 2021-08-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7602 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 81 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17399956 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/399956
VARIABLE GEOMETRY DIFFUSER HAVING EXTENDED TRAVEL AND CONTROL METHOD THEREOF Aug 10, 2021 Pending
Array ( [id] => 17370794 [patent_doc_number] => 20220025846 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-01-27 [patent_title] => ROTOR BLADE FOR A WIND POWER INSTALLATION, AND ASSOCIATED WIND POWER INSTALLATION [patent_app_type] => utility [patent_app_number] => 17/385578 [patent_app_country] => US [patent_app_date] => 2021-07-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5227 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 83 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17385578 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/385578
Rotor blade for a wind power installation, and associated wind power installation Jul 25, 2021 Issued
Array ( [id] => 20116536 [patent_doc_number] => 12366230 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-07-22 [patent_title] => Monitoring of blades in wind turbines [patent_app_type] => utility [patent_app_number] => 18/019212 [patent_app_country] => US [patent_app_date] => 2021-07-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 7 [patent_no_of_words] => 0 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 236 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18019212 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/019212
Monitoring of blades in wind turbines Jul 20, 2021 Issued
Array ( [id] => 18526760 [patent_doc_number] => 11713749 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-08-01 [patent_title] => Lightning protection system for a carbon pultruded blade and carbon pultruded blade [patent_app_type] => utility [patent_app_number] => 17/379277 [patent_app_country] => US [patent_app_date] => 2021-07-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 6 [patent_no_of_words] => 4983 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 183 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17379277 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/379277
Lightning protection system for a carbon pultruded blade and carbon pultruded blade Jul 18, 2021 Issued
Array ( [id] => 17827564 [patent_doc_number] => 20220264868 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-08-25 [patent_title] => WILDLIFE DETERRING WINDMILL [patent_app_type] => utility [patent_app_number] => 17/348386 [patent_app_country] => US [patent_app_date] => 2021-06-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6765 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 70 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17348386 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/348386
Wildlife deterring windmill Jun 14, 2021 Issued
Array ( [id] => 18524039 [patent_doc_number] => 20230234696 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-07-27 [patent_title] => PROPULSION UNIT WITH FOLDABLE PROPELLER BLADES AND METHOD FOR FOLDING THE BLADES [patent_app_type] => utility [patent_app_number] => 18/001688 [patent_app_country] => US [patent_app_date] => 2021-06-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 9328 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -8 [patent_words_short_claim] => 56 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18001688 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/001688
Propulsion unit with foldable propeller blades and method for folding the blades Jun 13, 2021 Issued
Array ( [id] => 18551807 [patent_doc_number] => 20230249812 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-08-10 [patent_title] => PROPULSION UNIT WITH FOLDABLE PROPELLER BLADES AND METHOD FOR FOLDING THE BLADES [patent_app_type] => utility [patent_app_number] => 18/001617 [patent_app_country] => US [patent_app_date] => 2021-06-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 9278 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -7 [patent_words_short_claim] => 280 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18001617 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/001617
Propulsion unit with foldable propeller blades and method for folding the blades Jun 13, 2021 Issued
Array ( [id] => 17259432 [patent_doc_number] => 20210372417 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-12-02 [patent_title] => METHOD FOR OPERATING A FAN SYSTEM AND FAN SYSTEM HAVING A BACKWARD CURVED CENTRIFUGAL FAN [patent_app_type] => utility [patent_app_number] => 17/331271 [patent_app_country] => US [patent_app_date] => 2021-05-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6514 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 211 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17331271 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/331271
Method for operating a fan system and fan system having a backward curved centrifugal fan May 25, 2021 Issued
Array ( [id] => 17081685 [patent_doc_number] => 20210276691 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-09-09 [patent_title] => LOCKING MECHANISM, PROPELLER, MOTOR, PROPULSION SYSTEM ASSEMBLY, AND AIRCRAFT [patent_app_type] => utility [patent_app_number] => 17/328770 [patent_app_country] => US [patent_app_date] => 2021-05-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7935 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 131 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17328770 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/328770
LOCKING MECHANISM, PROPELLER, MOTOR, PROPULSION SYSTEM ASSEMBLY, AND AIRCRAFT May 23, 2021 Abandoned
Array ( [id] => 17215257 [patent_doc_number] => 20210348595 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-11-11 [patent_title] => FLUID TURBINE [patent_app_type] => utility [patent_app_number] => 17/246338 [patent_app_country] => US [patent_app_date] => 2021-04-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3400 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [patent_words_short_claim] => 66 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17246338 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/246338
FLUID TURBINE Apr 29, 2021 Abandoned
Array ( [id] => 18419748 [patent_doc_number] => 20230174208 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-06-08 [patent_title] => A FLETTNER ROTOR WITH LOCALIZED SUCTION [patent_app_type] => utility [patent_app_number] => 17/922575 [patent_app_country] => US [patent_app_date] => 2021-04-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6906 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 83 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17922575 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/922575
Flettner rotor with localized suction Apr 29, 2021 Issued
Array ( [id] => 18496314 [patent_doc_number] => 20230218885 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-07-13 [patent_title] => BLOOD PUMP [patent_app_type] => utility [patent_app_number] => 18/001595 [patent_app_country] => US [patent_app_date] => 2021-04-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3878 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 2 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18001595 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/001595
Blood pump Apr 20, 2021 Issued
Array ( [id] => 17400399 [patent_doc_number] => 20220042489 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-02-10 [patent_title] => Collapsible frictionless Vertical axis power generating wind/ocean current turbine [patent_app_type] => utility [patent_app_number] => 17/301313 [patent_app_country] => US [patent_app_date] => 2021-03-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 9328 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => 0 [patent_words_short_claim] => 168 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17301313 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/301313
Collapsible frictionless vertical axis power generating wind/ocean current turbine Mar 30, 2021 Issued
Array ( [id] => 17096542 [patent_doc_number] => 20210284333 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-09-16 [patent_title] => SMALL LIGHT VERTICAL TAKE-OFF AND LANDING CAPABLE DELTA WING AIRCRAFT [patent_app_type] => utility [patent_app_number] => 17/203413 [patent_app_country] => US [patent_app_date] => 2021-03-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 12991 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -12 [patent_words_short_claim] => 200 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17203413 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/203413
Small light vertical take-off and landing capable delta wing aircraft Mar 15, 2021 Issued
Array ( [id] => 18297497 [patent_doc_number] => 20230107183 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-04-06 [patent_title] => VACUUM PUMP AND PIPING STRUCTURAL PORTION FOR VACUUM PUMP [patent_app_type] => utility [patent_app_number] => 17/907193 [patent_app_country] => US [patent_app_date] => 2021-03-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7088 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -8 [patent_words_short_claim] => 50 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17907193 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/907193
VACUUM PUMP AND PIPING STRUCTURAL PORTION FOR VACUUM PUMP Mar 10, 2021 Pending
Array ( [id] => 18350533 [patent_doc_number] => 20230138644 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-05-04 [patent_title] => FAN AND FAN BLADES [patent_app_type] => utility [patent_app_number] => 17/910461 [patent_app_country] => US [patent_app_date] => 2021-03-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3578 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 2 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17910461 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/910461
FAN AND FAN BLADES Mar 3, 2021 Abandoned
Array ( [id] => 17488745 [patent_doc_number] => 11278021 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2022-03-22 [patent_title] => Wildlife deterring windmill [patent_app_type] => utility [patent_app_number] => 17/184315 [patent_app_country] => US [patent_app_date] => 2021-02-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 4687 [patent_no_of_claims] => 17 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 208 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17184315 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/184315
Wildlife deterring windmill Feb 23, 2021 Issued
Array ( [id] => 18223974 [patent_doc_number] => 20230062968 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-03-02 [patent_title] => ADAPTIVE TUNED MASS DAMPER FOR DAMPING LOW EXCITATION FREQUENCIES [patent_app_type] => utility [patent_app_number] => 17/800240 [patent_app_country] => US [patent_app_date] => 2021-02-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7037 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -21 [patent_words_short_claim] => 221 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17800240 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/800240
Adaptive tuned mass damper for damping low excitation frequencies Feb 14, 2021 Issued
Array ( [id] => 18296688 [patent_doc_number] => 20230106374 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-04-06 [patent_title] => WIND TURBINE ROTOR BLADE WITH FRAMED ACCESS WINDOW [patent_app_type] => utility [patent_app_number] => 17/799358 [patent_app_country] => US [patent_app_date] => 2021-02-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 8037 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -13 [patent_words_short_claim] => 133 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17799358 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/799358
Wind turbine rotor blade with framed access window Feb 11, 2021 Issued
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