Granted Patent
Utility
US 4,376,662 · App. 06/146,396
Methods for fabricating metallic workpieces
Inventor:
Daniel J. Brimm
Patented Case
View Patent ↗
Granted: Mar 15, 1983
Filed: May 5, 1980
Inventor
Daniel J. Brimm
Assignee (at issue)
Chemtronics Co., Ltd.
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.