IP Library Granted Patent US 4,501,956
Granted Patent Utility
US 4,501,956 · App. 06/303,439

Electrical resistance heating element

Inventors: Hans A. Bergersen, Eilif Risberg
Patented Case View Patent ↗
Granted: Feb 26, 1985 Filed: Sep 18, 1981
Inventors
Hans A. Bergersen
Eilif Risberg
Assignee (at issue)
International Standard Electric 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 4,501,956
App. No.
06/303,439
Filed
1981-09-18
Granted
1985-02-26
Kind
A