IP Library › Granted Patent US 4,151,880
Granted Patent Utility
US 4,151,880 · App. 05/843,151

Vent assembly

Inventor: Roy R. Vann
Patented Case View Patent ↗
Granted: May 1, 1979 Filed: Oct 17, 1977
Inventor
Roy R. Vann
Assignee (at issue)
Peabody Vann

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 4,151,880
App. No.
05/843,151
Filed
1977-10-17
Granted
1979-05-01
Kind
A