Granted Patent
Utility
US 4,243,125 · App. 06/077,830
Self-adjusting drum brake
Inventors:
Robert Spaargaren, Albert DiMatteo
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Sep 21, 1979
Inventors
Robert Spaargaren
Albert DiMatteo
Assignee (at issue)
Chrysler Group LLC
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.