Granted Patent
Utility
US 4,530,040 · App. 06/587,619
Optical focusing system
Inventor:
Tor Petterson
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Mar 8, 1984
Inventor
Tor Petterson
Assignee (at issue)
Rayovac 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.