Granted Patent
Utility
US 4,072,253 · App. 05/652,351
Rotary feeder
Inventor:
Thomas Charles Walters
Patented Case
View Patent ↗
Granted: Feb 7, 1978
Filed: Jan 26, 1976
Inventor
Thomas Charles Walters
Assignee (at issue)
Ecolaire Incorporated
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.