Granted Patent
Utility
US 4,567,782 · App. 06/645,784
Compound parallelogram four-bar linkage
Inventors:
John M. Speicher, Allan A. Voigt
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Aug 30, 1984
Inventors
John M. Speicher
Allan A. Voigt
Assignee (at issue)
General Dynamics Corp., Pomona Division
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.