Normal L. Calhoun

Follow

Person

Cedar Falls, IA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Tambour door construction
- Patent number 5,372,175
- Issue date Dec 13, 1994
- Waterloo Industries, Inc.
- Normal L. Calhoun
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS