Membership
Tour
Register
Log in
Seiichi Ozawa
Follow
Person
Tokyo, JP
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Method for manufacture of polymer-impregnated hollow concrete product
Patent number
4,314,957
Issue date
Feb 9, 1982
Ozawa Concrete Industry Co., Ltd.
Seiichi Ozawa
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Method for manufacture of concrete products
Patent number
4,224,274
Issue date
Sep 23, 1980
Ozawa Concrete Industry Co., Ltd.
Seiichi Ozawa
B28 - WORKING CEMENT, CLAY, OR STONE