Granted Patent
Utility
US 4,544,047 · App. 06/474,217
Spring-applied, air-released, slack-adjusting parking brake
Inventors:
Quentin T. Clemmons, Paul F. Czerniewski
Patented Case
View Patent ↗
Granted: Oct 1, 1985
Filed: Mar 10, 1983
Inventors
Quentin T. Clemmons
Paul F. Czerniewski
Assignee (at issue)
American Standard 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.