Granted Patent
Utility
US 4,136,704 · App. 05/659,602
Rotor for a combine
Inventor:
Calvin J. Dyke
Patented Case
View Patent ↗
Granted: Jan 30, 1979
Filed: Feb 19, 1976
Inventor
Calvin J. Dyke
Assignee (at issue)
Sperry Rand Corporation
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.