Membership
Tour
Register
Log in
Frederick Dale Greenfield
Follow
Person
Harbor City, CA, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Porthole arrangement
Patent number
4,112,645
Issue date
Sep 12, 1978
Frederick Dale Greenfield
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT