Granted Patent
Utility
US 4,078,197 · App. 05/706,687
Proportional control for guidance system
Inventors:
Abraham Zeewy, Donald Geringer
Patented Case
View Patent ↗
Granted: Mar 7, 1978
Filed: Jul 19, 1976
Inventors
Abraham Zeewy
Donald Geringer
Assignee (at issue)
The Cecil Equipment Co.
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.