IP Library › Granted Patent US 4,745,388
Granted Patent Utility
US 4,745,388 · App. 07/009,772

Transformer with wire lead isolation slots

Inventors: Robert L. Billings, Robert C. Cooper
Patented Case View Patent ↗
Granted: May 17, 1988 Filed: Feb 2, 1987
Inventors
Robert L. Billings
Robert C. Cooper
Assignee (at issue)
American Telephone and Telegraph Company, AT&T Bell Laboratories

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 4,745,388
App. No.
07/009,772
Filed
1987-02-02
Granted
1988-05-17
Kind
A