Granted Patent
Utility
US 6,327,457 · App. 09/549,144
Opening-closing device with limited lifting range
Inventor:
Takayuki Hashimoto
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: Apr 13, 2000
Inventor
Takayuki Hashimoto
Assignee (at issue)
Katoh Electrical Machinery 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.