Granted Patent
Utility
US 4,757,335 · App. 07/029,439
Extender-containing camera lens with a grip
Inventors:
Takeshi Muryoi, Yasunobu Shinpo
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: Mar 23, 1987
Inventors
Takeshi Muryoi
Yasunobu Shinpo
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.