Granted Patent
Utility
US 4,612,757 · App. 06/722,952
Combine header attitude control mechanism
Inventors:
Lawrence M. Halls, Edward J. Wynn
Patented Case
View Patent ↗
Granted: Sep 23, 1986
Filed: Apr 12, 1985
Inventors
Lawrence M. Halls
Edward J. Wynn
Assignee (at issue)
Sperry Corp.
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.