| Patents for A63B 51 - Stringing tennis rackets (1,355) |
|---|
| 04/03/1991 | CN1050332A 球拍 Racket |
| 03/07/1991 | DE3929198A1 Stringing device for sports rackets - has several tension elements set on fastening plate and having slide carriages |
| 02/27/1991 | CN2071963U Device for regulating tension of string |
| 02/26/1991 | US4995608 Stringed frame with adjustable tensioning |
| 02/05/1991 | US4989864 Racquet string straightener |
| 01/03/1991 | DE3940294C1 Tennis racket with inclined strings - has strings threaded through edges of frame members to reduce risk of ball hitting frame |
| 12/11/1990 | US4976433 Racket, and more particularly a tennis racket |
| 12/06/1990 | DE3917868A1 Racket frame with string tension means - has bracket clip with V arms connecting frame ends together |
| 12/05/1990 | EP0400114A1 Stringing for tennis, badminton or like rackets |
| 11/22/1990 | EP0186686B1 Vibration dampening device for sporting rackets |
| 11/14/1990 | EP0396547A1 Ball-striking device, in particular tennis or squash racket |
| 11/14/1990 | CN2065495U Portable stringing machine for tennis racket |
| 09/19/1990 | CN2062235U Multi-layer net surface racket |
| 09/12/1990 | CN2061850U Braider for badminton and tennis racket |
| 08/23/1990 | WO1990009215A1 Vibration dampening device for a sports racket |
| 08/21/1990 | US4949968 Racket for ball games, in particular tennis, as well as stringing device therefor |
| 08/16/1990 | EP0382652A1 Stringing apparatus for a tennis racket |
| 08/09/1990 | WO1990008575A1 Sports racquet netting |
| 08/08/1990 | EP0380822A1 Stringing for a tennis, badminton or like racket |
| 07/31/1990 | CA1272226A1 Holder for stringing a racket |
| 07/11/1990 | EP0377362A1 Synthetic tennis string or the like, and method of making the same |
| 06/27/1990 | EP0374177A1 Device of rackets |
| 06/05/1990 | US4930782 Sports racket |
| 06/05/1990 | US4930778 Racket frame |
| 05/30/1990 | EP0370937A2 Racquet string tension measuring device |
| 05/30/1990 | CN2057594U Racket |
| 05/29/1990 | US4928963 Racket, particularly a tennis or squash racket |
| 05/22/1990 | CA2003431A1 Racquet string tension measuring device |
| 05/17/1990 | WO1990005002A1 Stringing for tennis, badminton or like rackets |
| 05/16/1990 | EP0197969B1 Process for the preparation of cellulose film, cellulose film produced thereby, artificial skin graft and its use |
| 05/08/1990 | CA1268792A1 Device for the protection of the strings of a ball racket, particularly tennis racket |
| 05/03/1990 | DE3836752A1 Tensioning part for rackets |
| 04/19/1990 | WO1990003829A1 Process and device for stringing rackets for ball games |
| 04/03/1990 | US4913434 Frame for a ball game racquet |
| 04/03/1990 | US4913430 Tennis racket strings having orthogonally directed protrusions for enhancing the grip when in contact with a tennis ball |
| 03/27/1990 | US4912049 Process for the preparation of cellulose film, cellulose film produced thereby, artificial skin graft and its use |
| 03/27/1990 | US4911445 Vibration dampening device for a sports racket having a strung striking surface |
| 03/20/1990 | US4909510 Sports racquet netting |
| 03/14/1990 | CN2054344U Improving struction bat handle |
| 03/08/1990 | WO1990001974A1 Sports racket |
| 02/22/1990 | DE3827851A1 Tennis racket |
| 01/11/1990 | WO1990000249A1 Racket string tension tester |
| 12/21/1989 | DE3918421A1 String for rackets, especially tennis or squash rackets |
| 12/14/1989 | WO1989011892A1 Device for rackets |
| 12/13/1989 | EP0345397A2 Tennis racquet |
| 12/07/1989 | DE3924674A1 Tennis racket with double-sided springing |
| 12/06/1989 | EP0344611A2 A racket, and more particularly a tennis racket |
| 11/16/1989 | WO1989010774A1 Tennis racket |
| 11/15/1989 | CN1037089A Springing ball |
| 10/31/1989 | US4876900 Racket string tension tester |
| 10/26/1989 | DE3912174A1 Racket |
| 10/17/1989 | US4874563 Of carbon fibers and thermoplastic resin |
| 10/17/1989 | US4874170 String clamp for racquet stringing machine |
| 10/03/1989 | US4871491 Process for preparing composite articles from composite fiber blends |
| 09/12/1989 | US4864875 Digital electronic calibrator for tennis racket stringing machines |
| 09/12/1989 | CA1259350A1 Strung sports racket with tension transmitting devices |
| 09/07/1989 | DE3806038A1 Racket for a ball game |
| 09/07/1989 | DE3805920A1 Method of making a network, in particular for the stringing of a ball-racket frame and network made accordingly, as well as a frame and aid for the production of such a network |
| 09/05/1989 | US4863168 Spacers for use as string protectors for tennis, squach and badminton rackets, and device for inserting these parts |
| 08/29/1989 | US4860531 Racquet strings |
| 08/24/1989 | WO1989007670A1 String construction for a sports racket |
| 08/10/1989 | WO1989006994A1 A racquet string straightener |
| 07/11/1989 | US4846474 Swivel glide bar rail table for a racquet stringing machine |
| 07/11/1989 | US4846002 Racket-stringing tester |
| 06/13/1989 | CA1255705A1 Racquet stringing retaining standard |
| 06/07/1989 | EP0319191A2 Racket string |
| 05/30/1989 | US4835036 Method for manufacturing a string in a form ready for a racket, a string manufactured by said method, and method for supply to stringing rackets with said string |
| 05/30/1989 | US4834383 Tennis racket with equal string lengths |
| 05/05/1989 | WO1989003709A1 Process and device for measuring the tension of racket strings |
| 04/18/1989 | US4822042 Electronic athletic equipment |
| 03/30/1989 | DE3731529A1 Ballschlaggeraet, insbesondere tennis- oder squashschlaeger Ballschlaggeraet, especially tennis or squashschlaeger |
| 03/23/1989 | WO1989002296A1 Ball-striking device, in particular tennis or squash racket |
| 03/16/1989 | DE3729229A1 Method for producing a tennis racket consisting of two parts |
| 03/09/1989 | WO1989001809A1 Device of rackets |
| 03/09/1989 | WO1989001808A1 Electronic athletic equipment |
| 02/21/1989 | US4805393 String construction for a sports racket |
| 02/21/1989 | CA1250329A1 Vibration dampening device for sporting rackets |
| 02/14/1989 | US4804183 Double faced sports racquet |
| 02/07/1989 | US4802678 Sports racket |
| 02/01/1989 | CN2031698U Net-string embedded type badminton, tennis racket |
| 01/03/1989 | US4794805 Tennis racket string tension tester |
| 12/01/1988 | DE3714571A1 Racket for a ball game |
| 11/09/1988 | EP0290424A2 Racket frame |
| 11/08/1988 | US4783072 Sporting equipment |
| 10/25/1988 | CA1243799A1 Sports racket strings of a synthetic thermoplastic polymeric material |
| 10/11/1988 | US4776592 Device for the protection of the strings of a ball racket, particularly tennis racket |
| 10/11/1988 | US4776591 Racket string straightener |
| 09/08/1988 | DE3706249A1 Apparatus for stringing racquets for ball games |
| 08/25/1988 | DE3705033A1 Tennis racket, label for this and method of production |
| 08/24/1988 | EP0202267B1 Method for fabricating a string for a racket, string obtained by said method and method for stringing a racket with said string |
| 08/23/1988 | US4765621 Tennis racquet |
| 08/02/1988 | CA1239948A1 Racket assembly |
| 07/05/1988 | US4754968 Racket having unique stringing pattern |
| 06/21/1988 | US4752071 Method of aligning strings in a racket |
| 06/09/1988 | DE3640498A1 Apparatus for tensioning strings, especially for tennis, badminton and squash stringing machines |
| 05/31/1988 | US4747314 Racket tester |
| 05/17/1988 | US4744562 String protector for a racket |
| 05/05/1988 | WO1988003041A1 Tool, in particular for stringing rackets having separate strings |
| 05/05/1988 | WO1988003040A1 Rackets, especially for tennis and squash |
| 05/03/1988 | US4741531 Stringing system for a racket and method for stringing a racket |