IP Library › Granted Patent US 3,931,517
Granted Patent Utility
US 3,931,517 · App. 05/537,880

Field emission electron gun

Inventors: Vincent J. Coates, Leonard M. Welter
Patented Case View Patent ↗
Granted: Jan 6, 1976 Filed: Jan 2, 1975
Inventors
Vincent J. Coates
Leonard M. Welter
Assignee (at issue)
American Optical 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 3,931,517
App. No.
05/537,880
Filed
1975-01-02
Granted
1976-01-06
Kind
A