Granted Patent
Utility
US 4,227,658 · App. 05/941,315
Paper winder assembly including pressure modulating valve
Inventor:
Edgar J. Justus
Patented Case
View Patent ↗
Granted: Oct 14, 1980
Filed: Sep 11, 1978
Inventor
Edgar J. Justus
Assignee (at issue)
Beloit Corporation
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.