IP Library Granted Patent US 4,199,767
Granted Patent Utility
US 4,199,767 · App. 06/012,987

Nozzle valve for ink jet printers

Inventors: Alan Stirling Campbell, Jack H. Jennings
Patented Case View Patent ↗
Granted: Apr 22, 1980 Filed: Feb 21, 1979
Inventors
Alan Stirling Campbell
Jack H. Jennings
Assignee (at issue)
International Business Machines 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 4,199,767
App. No.
06/012,987
Filed
1979-02-21
Granted
1980-04-22
Kind
A