Extension ladder with cushions | Patent Publication Number 20170335625

US 20170335625 A1

Patent NumberUS 09845640 B2

Application Number15593452

Filled DateMay 12, 2017

Priority DateMay 12, 2017

Publication DateNov 23, 2017

Original AssigneeColumbia Aluminum Products Llc

Current AssigneeColumbia Aluminum Products Llc

Inventor/ApplicantsHan-Tsung Chen

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