Granted Patent
Utility
US 4,688,921 · App. 06/894,959
Alarm device for camera
Inventor:
Tsutomu Wakabayashi
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Aug 8, 1986
Inventor
Tsutomu Wakabayashi
Assignee (at issue)
Nippon Kogaku 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.