Granted Patent
Utility
US 4,841,215 · App. 07/065,333
D.C. solenoid control circuit
Inventor:
Stephen P. Verbos
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Jun 22, 1987
Inventor
Stephen P. Verbos
Assignee (at issue)
Lift-Tech International, 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.