STEPHEN T DAVIS
Cosmetology in Yardley, PA

5176868, Jan 5, 1993

Jan 24, 1991

7/645255

Stephen J. Davis - Yardley PA

Prince Manufacturing, Inc. - Lawrenceville NJ

B29C 3312

264257

A long fiber, thermoplastic frame for a tennis racquet or other implement is formed of fibers of carbon or other reinforcement material, which are oriented at desired angles, and which are intimately embedded in thermoplastic resin. A frame according to the invention is made by co-winding or commingling tows of carbon or other reinforcing fibers with filaments of thermoplastic material, or by preimpregnating fibers with a thermoplastic powder. The fibers, which are preferable formed into a braided sleeve for ease of handling, are disposed in a heated mold, and internally pressurized to conform to the mold and such that the thermoplastic melts and flows into intimate contact with the fiber material. A frame according to the invention possesses the strength and stiffness of a long fiber, thermoset frame, but unlike a thermoset frame has dynamic stiffness due to the visco-elastic properties of the thermoplastic resin.

5211397, May 18, 1993

Jan 30, 1992

7/827864

Stephen J. Davis - Yardley PA
Kenneth A. Stevens - Lansdale PA

Prince Manufacturing, Inc. - Princeton NJ

A63B 5110

273 73D

A vibration absorber for tennis racquet strings includes a thin, flexible strip with a relatively massive donut shape member at either end. The device is weaved over and under the racquet main strings, so that the flexible strip contacts preferably between 4 and 6 of the center main strings, and the donut members engage, through a clamping groove, a pair of outlying strings. The device provides a good vibration dampening on the outer part of the string area, for dampening off center hits, whereas the center main strings remain lively and resilient.

D326698, Jun 2, 1992

Mar 4, 1991

7/665143

Stephen J. Davis - Yardley PA

Prince Manufacturing, Inc. - Lawrenceville NJ

D21212

5071124, Dec 10, 1991

May 3, 1990

7/518136

Stephen J. Davis - Yardley PA

Prince Manufacturing, Inc - Lawrenceville NJ

A63B 4902

273 73G

A badminton racquet includes a head, a shaft, and a Y-joint connecting the head to the shaft. The Y-joint geometry offers improved transmission of stress from the head to the shaft, and the resulting increased length of the center longitudinal strings improves power. Preferably, the frame has an improved aerodynamic profile, and a kick shaft to produce greater head speed at the point of impact.

5318297, Jun 7, 1994

Dec 23, 1992

7/995953

Stephen Davis - Yardley PA
Ken Stevens - Lansdale PA

Prince Manufacturing, Inc. - Princeton NJ

A63B 5302, A63B 5304

273 802

The present invention relates to a novel golf club having means to impart lift to the club head in order to counteract the forces which are exerted upon the head of the club during the swing that produce a dipping effect.