Granted Patent
Utility
US 4,991,347 · App. 07/530,478
Opening/closing mechanism for the use in circular-arc shaped sliding doors
Inventors:
Akiyoshi Takimoto, Kenzo Ono, Yuichi Noguchi
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: May 29, 1990
Inventors
Akiyoshi Takimoto
Kenzo Ono
Yuichi Noguchi
Assignee (at issue)
Yoshida Kogyo K.K.
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.