Granted Patent
Utility
US 4,868,895 · App. 07/323,055
Optical device copensator
Inventors:
David L. Hershberger, Gordon E. Ransom
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Mar 14, 1989
Inventors
David L. Hershberger
Gordon E. Ransom
Assignee (at issue)
GRASS VALLEY LIMITED
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.