The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2003
Filed:
May. 14, 2001
Applicant:
Inventors:
Ching Yin Au, Greenwich, CT (US);
Lawrence Au, Vienna, VA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B63H 1/04 ;
U.S. Cl.
CPC ...
B63H 1/04 ;
Abstract
Watercrafts comprising rotatable hulls that serve as propulsors. The hulls are rotors with paddle surfaces and are arranged three-dimensionally to gain the capability of actively diverting water toward the side and the rear, for the purpose of drastically reducing frontal drag and the capability of minimizing friction drag on their wetted surfaces. Watercrafts with rotatable hulls are essentially amphibious.