Granted Patent
Utility
US 6,550,826 · App. 09/746,126
Door lock apparatus
Inventors:
Yasuyuki Fukushima, Noboru Takamura, Shigenori Taga, Jun Yamagishi
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Dec 22, 2000
Inventors
Yasuyuki Fukushima
Noboru Takamura
Shigenori Taga
Jun Yamagishi
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.