Granted Patent
Utility
US 4,407,115 · App. 06/284,574
Haymaking machine
Inventors:
Ulrich Wessel, Albrecht Scherer
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Jul 17, 1981
Inventors
Ulrich Wessel
Albrecht Scherer
Assignee (at issue)
Klockner-Humboldt-Deutz AG (Branch Establishment Fahr)
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.