Granted Patent
Utility
US 4,972,217 · App. 07/428,055
Shutter mechanism drive having reduced mechanical noise
Inventor:
John P. Gaewsky
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Oct 27, 1989
Inventor
John P. Gaewsky
Assignee (at issue)
Polaroid 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.