Granted Patent
Utility
US 4,301,834 · App. 06/073,409
Adjustment method pipelayer control system
Inventors:
Glen S. Comer, Jr., Henry Ejchler
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Feb 2, 1979
Inventors
Glen S. Comer, Jr.
Henry Ejchler
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.