Granted Patent
Utility
US 4,375,221 · App. 06/272,222
Adjustable support for concaves
Inventors:
Richard P. Bernhardt, Everett C. Cowan, Jr.
Patented Case
View Patent ↗
Granted: Mar 1, 1983
Filed: Jun 10, 1981
Inventors
Richard P. Bernhardt
Everett C. Cowan, Jr.
Assignee (at issue)
Sperry Corp.
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.