Gregg A. Hietpas

Follow

Person

St. Paul, MN, US

People

Patents Grantslast 30 patents

Information Patent Grant
Infrared selective reflective polarizing element
- Patent number 6,185,039
- Issue date Feb 6, 2001
- 3M Innovative Properties Co.
- Richard C. Allen
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Light valve with rotating polarizing element
- Patent number 5,999,316
- Issue date Dec 7, 1999
- 3M Innovative Properties Company
- Richard C. Allen
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS