Peter H. Spragg

Follow

Person

Weare, NH, US

People

Patents Grantslast 30 patents

Information Patent Grant
Method of making an article from a lightweight cementitious composi...
- Patent number 6,358,575
- Issue date Mar 19, 2002
- Peter H. Spragg
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method of making an article from a lightweight cementitious composi...
- Patent number 5,902,528
- Issue date May 11, 1999
- Peter H. Spragg
- B28 - WORKING CEMENT, CLAY, OR STONE