Granted Patent
Utility
US 4,381,088 · App. 06/192,752
Bobbin core
Inventor:
Randy E. Bryant
Patented Case
View Patent ↗
Granted: Apr 26, 1983
Filed: Oct 1, 1980
Inventor
Randy E. Bryant
Assignee (at issue)
DayCo Holdings, LP
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.