James A. Welch

Follow

Person

Black Canyon City, AZ, US

People

Patents Grantslast 30 patents

Information Patent Grant
Elevating earth scraper
- Patent number 4,294,026
- Issue date Oct 13, 1981
- Sanner Contracting Co.
- James A. Welch
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING