Granted Patent
Utility
US 6,264,253 · App. 09/141,724
Door lock apparatus provided with a sensing switch
Inventor:
Tatsuyuki Takaishi
Patented Case
View Patent ↗
Granted: Jul 24, 2001
Filed: Aug 27, 1998
Inventor
Tatsuyuki Takaishi
Assignee (at issue)
Ohi Seisakusho Co., Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.