Search

Keith D. Walker

Supervisory Patent Examiner (ID: 7518, Phone: (571)272-3458 , Office: P/1735 )

Most Active Art Unit
1735
Art Unit(s)
1726, 1745, 1795, 1735
Total Applications
565
Issued Applications
152
Pending Applications
54
Abandoned Applications
362

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 17068045 [patent_doc_number] => 20210270260 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-09-02 [patent_title] => Compressor Cylinder Switching Control Method and Device, Unit and Air Conditioning System [patent_app_type] => utility [patent_app_number] => 17/259578 [patent_app_country] => US [patent_app_date] => 2018-12-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7667 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [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] => 17259578 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/259578
Compressor cylinder switching control method and device, unit and air conditioning system Dec 18, 2018 Issued
Array ( [id] => 17728371 [patent_doc_number] => 11384752 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-07-12 [patent_title] => Agricultural work vehicle having air supply device [patent_app_type] => utility [patent_app_number] => 16/969390 [patent_app_country] => US [patent_app_date] => 2018-12-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 5379 [patent_no_of_claims] => 6 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 211 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16969390 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/969390
Agricultural work vehicle having air supply device Dec 13, 2018 Issued
Array ( [id] => 16504505 [patent_doc_number] => 20200383761 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-12-10 [patent_title] => ORAL CLEANING DEVICE WITH VARIABLE FLUID PRESSURIZATION [patent_app_type] => utility [patent_app_number] => 16/767143 [patent_app_country] => US [patent_app_date] => 2018-11-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7028 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -10 [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] => 16767143 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/767143
ORAL CLEANING DEVICE WITH VARIABLE FLUID PRESSURIZATION Nov 27, 2018 Abandoned
Array ( [id] => 19151746 [patent_doc_number] => 11976649 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-05-07 [patent_title] => Air pump with external pressure relief valve [patent_app_type] => utility [patent_app_number] => 17/271429 [patent_app_country] => US [patent_app_date] => 2018-11-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 8 [patent_no_of_words] => 3914 [patent_no_of_claims] => 6 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 243 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17271429 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/271429
Air pump with external pressure relief valve Nov 14, 2018 Issued
Array ( [id] => 16399605 [patent_doc_number] => 20200340463 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-10-29 [patent_title] => BENT AXIS HYDRAULIC PUMP WITH CENTRIFUGAL ASSIST [patent_app_type] => utility [patent_app_number] => 16/757995 [patent_app_country] => US [patent_app_date] => 2018-11-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 9895 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [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] => 16757995 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/757995
Bent axis hydraulic pump with centrifugal assist Nov 14, 2018 Issued
Array ( [id] => 18202958 [patent_doc_number] => 11585346 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-02-21 [patent_title] => Pump assembly, in particular for supplying a slide ring seal assembly [patent_app_type] => utility [patent_app_number] => 16/761018 [patent_app_country] => US [patent_app_date] => 2018-11-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 2 [patent_no_of_words] => 3084 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 269 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16761018 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/761018
Pump assembly, in particular for supplying a slide ring seal assembly Nov 11, 2018 Issued
Array ( [id] => 17429192 [patent_doc_number] => 20220056901 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-02-24 [patent_title] => FAULT DETECTION AND PREDICTION [patent_app_type] => utility [patent_app_number] => 17/290477 [patent_app_country] => US [patent_app_date] => 2018-11-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4977 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -16 [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] => 17290477 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/290477
Fault detection and prediction Nov 1, 2018 Issued
Array ( [id] => 16306041 [patent_doc_number] => 10774822 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-09-15 [patent_title] => Multiphase production boost method and system [patent_app_type] => utility [patent_app_number] => 16/157212 [patent_app_country] => US [patent_app_date] => 2018-10-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 5 [patent_no_of_words] => 7235 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 375 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16157212 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/157212
Multiphase production boost method and system Oct 10, 2018 Issued
Array ( [id] => 16383883 [patent_doc_number] => 10808708 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-10-20 [patent_title] => Cup-cover fan and water cup thereof [patent_app_type] => utility [patent_app_number] => 16/157107 [patent_app_country] => US [patent_app_date] => 2018-10-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 14 [patent_no_of_words] => 4198 [patent_no_of_claims] => 34 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 145 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16157107 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/157107
Cup-cover fan and water cup thereof Oct 10, 2018 Issued
Array ( [id] => 18505234 [patent_doc_number] => 11703041 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-07-18 [patent_title] => Vehicular electric compressor [patent_app_type] => utility [patent_app_number] => 16/761938 [patent_app_country] => US [patent_app_date] => 2018-10-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 8 [patent_no_of_words] => 3502 [patent_no_of_claims] => 3 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 217 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16761938 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/761938
Vehicular electric compressor Oct 8, 2018 Issued
Array ( [id] => 16697376 [patent_doc_number] => 10947962 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2021-03-16 [patent_title] => Low disturbance cryocooler compressor [patent_app_type] => utility [patent_app_number] => 16/153608 [patent_app_country] => US [patent_app_date] => 2018-10-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 6699 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 116 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16153608 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/153608
Low disturbance cryocooler compressor Oct 4, 2018 Issued
Array ( [id] => 14215747 [patent_doc_number] => 20190120258 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-04-25 [patent_title] => HYDRAULIC PRESSURE AMPLIFIER ARRANGEMENT [patent_app_type] => utility [patent_app_number] => 16/153068 [patent_app_country] => US [patent_app_date] => 2018-10-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2431 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -12 [patent_words_short_claim] => 96 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16153068 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/153068
Hydraulic pressure amplifier arrangement Oct 4, 2018 Issued
Array ( [id] => 16298528 [patent_doc_number] => 20200284251 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-09-10 [patent_title] => PRESSURE SAFETY SHUTOFF [patent_app_type] => utility [patent_app_number] => 16/649554 [patent_app_country] => US [patent_app_date] => 2018-09-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3518 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 89 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16649554 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/649554
Pressure safety shutoff Sep 24, 2018 Issued
Array ( [id] => 16832791 [patent_doc_number] => 11009032 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2021-05-18 [patent_title] => Centrifugal fan [patent_app_type] => utility [patent_app_number] => 16/137544 [patent_app_country] => US [patent_app_date] => 2018-09-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 8 [patent_no_of_words] => 4976 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 245 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16137544 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/137544
Centrifugal fan Sep 20, 2018 Issued
Array ( [id] => 16663957 [patent_doc_number] => 10933180 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2021-03-02 [patent_title] => Cardiac pump having a turbine with internal blades [patent_app_type] => utility [patent_app_number] => 16/649574 [patent_app_country] => US [patent_app_date] => 2018-09-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 27 [patent_no_of_words] => 6534 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 118 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16649574 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/649574
Cardiac pump having a turbine with internal blades Sep 18, 2018 Issued
Array ( [id] => 18964788 [patent_doc_number] => 11898544 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-02-13 [patent_title] => Package type fluid machine [patent_app_type] => utility [patent_app_number] => 17/267972 [patent_app_country] => US [patent_app_date] => 2018-09-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 12 [patent_no_of_words] => 3008 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 99 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17267972 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/267972
Package type fluid machine Sep 12, 2018 Issued
Array ( [id] => 19048279 [patent_doc_number] => 11937410 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-03-19 [patent_title] => Package-type fluid machine [patent_app_type] => utility [patent_app_number] => 17/264807 [patent_app_country] => US [patent_app_date] => 2018-09-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 12 [patent_no_of_words] => 3230 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 237 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17264807 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/264807
Package-type fluid machine Sep 12, 2018 Issued
Array ( [id] => 19536185 [patent_doc_number] => 12128724 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-10-29 [patent_title] => Dual air compressor for hybrid vehicles [patent_app_type] => utility [patent_app_number] => 17/270233 [patent_app_country] => US [patent_app_date] => 2018-08-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 5 [patent_no_of_words] => 8943 [patent_no_of_claims] => 3 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 301 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17270233 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/270233
Dual air compressor for hybrid vehicles Aug 27, 2018 Issued
Array ( [id] => 16808861 [patent_doc_number] => 20210131414 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-05-06 [patent_title] => MACHINE TOOL SYSTEM HAVING COMPACT AIR COMPRESSOR [patent_app_type] => utility [patent_app_number] => 16/640051 [patent_app_country] => US [patent_app_date] => 2018-08-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2109 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -5 [patent_words_short_claim] => 55 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16640051 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/640051
Machine tool system having compact air compressor Aug 13, 2018 Issued
Array ( [id] => 13735275 [patent_doc_number] => 20180372105 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-12-27 [patent_title] => BRACKETLESS MAGNETIC PUMP [patent_app_type] => utility [patent_app_number] => 16/103396 [patent_app_country] => US [patent_app_date] => 2018-08-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5395 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -13 [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] => 16103396 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/103396
Bracketless magnetic pump Aug 13, 2018 Issued
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