Granted Patent
Utility
US 4,334,415 · App. 06/165,832
Universal coupling spider bearing and yoke
Inventors:
Michael F. Hopkins, Alvin D. Mayerchin
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Jan 28, 1980
Inventors
Michael F. Hopkins
Alvin D. Mayerchin
Assignee (at issue)
Caterpillar Tractor Co.
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.