Granted Patent
Utility
US 4,288,146 · App. 06/149,587
Curved reflector with adjustable focal length
Inventors:
Alfred L. Johnson, Jr., Victor A. Peckham
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: May 14, 1980
Inventors
Alfred L. Johnson, Jr.
Victor A. Peckham
Assignee (at issue)
LaJet Energy Company
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.