Granted Patent
Utility
US 4,553,421 · App. 06/605,057
Ring compressor tool
Inventors:
Lawrence A. Provost, Robert Boyer
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Apr 30, 1984
Inventors
Lawrence A. Provost
Robert Boyer
Assignee (at issue)
Sealed Power 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.