Granted Patent
Utility
US 4,942,415 · App. 07/400,686
Shutter for a photogrammetric camera
Inventors:
Karl Felle, Heinz Krastel
Patented Case
View Patent ↗
Granted: Jul 17, 1990
Filed: Aug 30, 1989
Inventors
Karl Felle
Heinz Krastel
Assignee (at issue)
Carl Zeiss Stiftung
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.