IP Library › Granted Patent US 4,648,311
Granted Patent Utility
US 4,648,311 · App. 06/443,749

Downwardly swinging replaceable air filter for a vehicle cab

Inventors: Michael L. Slosiarek, Robert Wagner
Patented Case View Patent ↗
Granted: Mar 10, 1987 Filed: Nov 22, 1982
Inventors
Michael L. Slosiarek
Robert Wagner
Assignee (at issue)
Deutz-Allis 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.

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 4,648,311
App. No.
06/443,749
Filed
1982-11-22
Granted
1987-03-10
Kind
A