Granted Patent
Utility
US 4,500,767 · App. 06/517,840
Shadow mask washer/spring welding apparatus
Inventors:
Leonard P. Wilbur, Jr., Marinus Van Renssen
Patented Case
View Patent ↗
Granted: Feb 19, 1985
Filed: Jul 27, 1983
Inventors
Leonard P. Wilbur, Jr.
Marinus Van Renssen
Assignee (at issue)
RCA 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.