Tennis racket

Patent 4690405 Issued on September 1, 1987. Estimated Expiration Date:

September 1, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2215899

Hockey stick
Patent #: 3934875
Issued on: 01/27/1976
Inventor: Easton , et al.

Tennis rackets and similar implements with vibration damper
Patent #: 3941380
Issued on: 03/02/1976
Inventor: Lacoste

Laminated fiberglass tennis racket
Patent #: 3993308
Issued on: 11/23/1976
Inventor: Jenks

Tennis racket
Patent #: 3999756
Issued on: 12/28/1976
Inventor: Head

Games racquets
Patent #: 4119313
Issued on: 10/10/1978
Inventor: Popplewell , et al.

Racket and throat piece therefor
Patent #: 4138109
Issued on: 02/06/1979
Inventor: Nobbs

Tennis racket
Patent #: 4165071
Issued on: 08/21/1979
Inventor: Frolow

Implement for striking a ball
Patent #: 4180265
Issued on: 12/25/1979
Inventor: Staufer

Game racquet
Patent #: 4280699
Issued on: 07/28/1981
Inventor: Drake

More ...

Inventor

Frolow, Jack L.

Application

No. 06/543431 filed on 10/19/1983

US Classes:

473/523In, under, or contacting grip

Examiners

Primary: Pinkham, Richard C.
Assistant: Schneider, Matthew L.

International Class

A63B 59/00 (20060101)

Abstract

A tennis racket having an unconventional weight and stiffness distribution providing for the same swing weight as rackets of the prior art, a large distance of the center of percussion from the handle end, and a weight means in the grip portion of the racket for reducing the shock and vibration transmitted to the player's arm, when the player impacts the ball with the racket.