| Patents for A63B 51 - Stringing tennis rackets (1,355) |
|---|
| 09/25/1979 | US4168603 Process of manufacturing plastic strings for ball-striking implements |
| 09/18/1979 | US4168065 Racket |
| 08/14/1979 | CA1060496A1 Racket for tennis, badminton, squash or the like |
| 08/07/1979 | US4163553 Tennis racket and stringing method |
| 07/31/1979 | US4162791 Tennis racquet having radially arrayed strings |
| 05/29/1979 | US4156525 Racket stringing apparatus |
| 04/17/1979 | US4149722 Pre-formed racket string with inter-locked webbing |
| 03/13/1979 | CA1050581A1 Rackets with two parallel strung faces |
| 02/27/1979 | US4141549 Tennis racket |
| 02/20/1979 | US4140316 Tennis racquet |
| 01/16/1979 | CA1046545A1 Practice tennis racket |
| 12/26/1978 | US4131279 Tennis racket and stringing method |
| 12/19/1978 | US4130278 Racquet stringing machine |
| 11/14/1978 | US4125259 String clamping device and support structure therefor for racket and like stringing machines |
| 10/17/1978 | US4120146 Strings formed at least partially of synthetic material |
| 10/03/1978 | US4118029 Method for making a tennis, badminton or similar racket net, net obtained by this method and racket comprising this net |
| 09/26/1978 | US4116054 Apparatus for measuring the combined resistance to displacement of strings affixed in a racket head |
| 08/01/1978 | US4103546 Tennis racquet string tension gauge |
| 07/25/1978 | US4102533 Adjustable head racquet frame |
| 07/11/1978 | US4099717 Adjustable tension tennis racket |
| 07/11/1978 | US4099716 Game racket |
| 06/27/1978 | US4097234 Soaking in sodium sulfate, comminution |
| 06/20/1978 | US4095790 Tennis racket with tensioned one-piece ball-striking friction imparting grid |
| 06/06/1978 | US4093220 Tennis racket string network |
| 05/16/1978 | US4089523 Aligning tool for strings of racket |
| 04/18/1978 | US4084399 Carbon and organic fibers |
| 04/04/1978 | US4082275 Sport racket |
| 04/04/1978 | US4082272 Tennis racket string positioning device |
| 03/14/1978 | US4078796 Insert device for application to the intersections of tennis racket strings |
| 02/28/1978 | US4076241 Sports racket |
| 12/06/1977 | US4061333 Adjustable tennis racquet |
| 11/08/1977 | US4057249 Tennis racket |
| 11/01/1977 | US4055999 Tension tester for tennis racket strings |
| 11/01/1977 | US4055941 Integrated string |
| 09/20/1977 | US4049269 Rackets |
| 09/20/1977 | US4049268 Racket string clamp |
| 08/23/1977 | US4043555 Racquet string and method |
| 07/05/1977 | US4033582 Method of stringing rackets |
| 06/28/1977 | US4032142 Practice tennis racket |
| 06/14/1977 | US4029317 Games racket |
| 06/07/1977 | US4027371 Device for the insertion of an intermediate member between two crossing strings of a tennis racquet |
| 05/31/1977 | US4026553 Racket for tennis, badminton, squash or the like |
| 04/12/1977 | US4016714 String construction |
| 03/29/1977 | US4015133 Method of producing string of polyamide and stringed rackets and stringed musical instruments with such strings |
| 03/22/1977 | US4013290 Racket for tennis and similar games |
| 03/22/1977 | US4013289 Tennis racket |
| 02/01/1977 | US4005863 Tennis rackets |
| 11/30/1976 | US3994496 Sports racket stringing aid |
| 11/30/1976 | US3994495 Tennis racket |
| 11/09/1976 | US3990700 Adjusting string tension |
| 10/26/1976 | US3988022 Racket stringing machine |
| 07/13/1976 | US3968966 Racquet with two independently strung faces |
| 06/29/1976 | US3966207 String system for a game racket |
| 06/22/1976 | US3964291 Tennis racquet stringing calibrator |
| 01/27/1976 | US3934876 Game racket |