Granted Patent
Utility
US 4,557,573 · App. 06/594,130
Photosensor arrangement for encoding lens and shutter blade position
Inventors:
Bruce K. Johnson, George D. Whiteside
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Mar 28, 1984
Inventors
Bruce K. Johnson
George D. Whiteside
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.