Granted Patent
Utility
US 4,274,512 · App. 06/007,074
Roving brake
Inventor:
David W. Goelz
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Jan 29, 1979
Inventor
David W. Goelz
Assignee (at issue)
Poly-Glas Systems, 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.