IP Library › Granted Patent US 4,622,513
Granted Patent Utility
US 4,622,513 · App. 06/655,923

Gating of the thyristors in an arcless tap changing regulator

Inventor: Frederick A. Stich
Patented Case View Patent ↗
Granted: Nov 11, 1986 Filed: Sep 28, 1984
Inventor
Frederick A. Stich
Assignee (at issue)
SIEMENS ENERGY & AUTOMATION, INC.

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 4,622,513
App. No.
06/655,923
Filed
1984-09-28
Granted
1986-11-11
Kind
A