Granted Patent
Utility
US 4,375,279 · App. 06/278,504
Bobbin assembly
Inventor:
Keith E. Koch
Patented Case
View Patent ↗
Granted: Mar 1, 1983
Filed: Mar 23, 1981
Inventor
Keith E. Koch
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.