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:
Jan. 29, 1991
Filed:
Jan. 08, 1990
Applicant:
Inventors:
Seiya Yamashita, Yokohama, JP;
Haruo Sasaki, Tokyo, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B63B / ;
U.S. Cl.
CPC ...
114265 ; 114264 ; 114266 ; 114267 ;
Abstract
A column belt is between upper and lower reduced-diameter columns and is only in the vicinity of and across the water surface so that the heave resonant period is increased which is due to the effect of the shape of the column belt.