Granted Patent
Utility
US 4,407,110 · App. 06/306,552
Frame for crop harvesting header
Inventors:
Irwin D. McIlwain, Lawrence M. Halls
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Sep 28, 1981
Inventors
Irwin D. McIlwain
Lawrence M. Halls
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.