IP Library Granted Patent US 5,181,663
Granted Patent Utility
US 5,181,663 · App. 07/829,317

Tub grinder with screen portion

Inventors: John Dorscht, Patrick Hogan
Patented Case View Patent ↗
Granted: Jan 26, 1993 Filed: Feb 3, 1992
Inventors
John Dorscht
Patrick Hogan

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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,181,663
App. No.
07/829,317
Filed
1992-02-03
Granted
1993-01-26
Kind
A