Granted Patent
Utility
US 5,000,297 · App. 07/353,120
Electric drum brake
Inventors:
Schuyler S. Shaw, Linda L. Hallinan, Robert J. Hammersmith, Donald Edward Schenk, Edward J. DeHoff, Alexander Kade
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: May 17, 1989
Inventors
Schuyler S. Shaw
Linda L. Hallinan
Robert J. Hammersmith
Donald Edward Schenk
Edward J. DeHoff
Alexander Kade
Assignee (at issue)
General Motors 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.