John L. Clatworthy

Follow

Person

Harringay-London, GB

People

Patents Grantslast 30 patents

Information Patent Grant
Clay type liquid-resistant protective layer
- Patent number 5,620,778
- Issue date Apr 15, 1997
- Pharo Limited
- John Clatworthy
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Method of manufacturing liquid-repellant covering layer
- Patent number 5,476,625
- Issue date Dec 19, 1995
- Pharo Limited
- John L. Clatworthy
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING