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:
Apr. 13, 1999
Filed:
Aug. 09, 1996
Applicant:
Inventor:
Helmut Umlauft, Hard, AT;
Assignee:
Head Sport Aktiengesellschaft, Kennelbach, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A63B / ;
U.S. Cl.
CPC ...
473537 ;
Abstract
A tennis racket having a striking surface and a handle in combination has a strung total weight of less than 245 g, an overall length larger than 70 cm, a free-free vibrational frequency in the first mode of more than 210 Hz, a center of gravity of more than 41 cm, and a dynamic center of gravity of more than 50 cm, measured from the handle end.