Granted Patent
Utility
US 4,952,800 · App. 07/395,046
Photoelectric switch with heating responsive to temperature and light
Inventors:
Atsuhito Kobayashi, Shoichi Ono, Takayuki Shiraishi, Kohei Hosayama
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Aug 17, 1989
Inventors
Atsuhito Kobayashi
Shoichi Ono
Takayuki Shiraishi
Kohei Hosayama
Assignee (at issue)
Chino Corporation
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.