Melvin D. Martin

Follow

Person

Portland, OR, US

People

Patents Grantslast 30 patents

Information Patent Grant
Method for making sleeve encased concrete posts
- Patent number 5,229,051
- Issue date Jul 20, 1993
- Perma-Post International, Inc.
- Melvin D. Martin
- B28 - WORKING CEMENT, CLAY, OR STONE