Granted Patent
Utility
US 4,493,465 · App. 06/369,481
Helicopter engine torque compensator
Inventors:
James J. Howlett, Raymond D. Zagranski
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Apr 16, 1982
Inventors
James J. Howlett
Raymond D. Zagranski
Assignee (at issue)
Chandler Evans 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.