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:
Dec. 14, 1993
Filed:
Jun. 18, 1992
Applicant:
Inventors:
Alan J Adler, Palo Alto, CA (US);
Brendan J Boyle, Palo Alto, CA (US);
Fern Mandelbaum, Menlo Park, CA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
A63B / ;
U.S. Cl.
CPC ...
273 / ; 273 / ; 273 / ; 273D / ; 273 / ;
Abstract
A ball of prolate (football-shaped) configuration having external fins oriented at an angle relative to the longitudinal axis to promote rotation in flight and having leading and trailing edges positioned such that the net center of aerodynamic lift of said fins is located rearwardly of the ball's longitudinal midpoint.