Granted Patent
Utility
US 4,548,302 · App. 06/556,519
Two-stage clutch damper assembly
Inventors:
Thaddeus Lech, Jr., Robert A. Frantz, III
Patented Case
View Patent ↗
Granted: Oct 22, 1985
Filed: Nov 30, 1983
Inventors
Thaddeus Lech, Jr.
Robert A. Frantz, III
Assignee (at issue)
BorgWarner Inc.
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.