IP Library › Granted Patent US 4,881,870
Granted Patent Utility
US 4,881,870 · App. 07/271,611

Air blower safety control

Inventors: Gregory A. Ritter, Graham M. Barton, Ronald J. Sargent
Patented Case View Patent ↗
Granted: Nov 21, 1989 Filed: Nov 15, 1988
Inventors
Gregory A. Ritter
Graham M. Barton
Ronald J. Sargent
Assignee (at issue)
Alopex Industries, Inc.

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 4,881,870
App. No.
07/271,611
Filed
1988-11-15
Granted
1989-11-21
Kind
A