Granted Patent
Utility
US 4,509,840 · App. 06/581,539
Lens drive for auto focus camera
Inventors:
Bruce K. Johnson, George D. Whiteside
Patented Case
View Patent ↗
Granted: Apr 9, 1985
Filed: Feb 21, 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.