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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Application No. | Application Title | Issue Date |
| 20110300963 | PRACTICE GOLF CLUB CAPABLE OF ADJUSTING HEAD SPEED The present invention relates to a practice golf club capable of adjusting head speed having a head (H) attached to an end of a shaft(S) having a grip (G), from which an impact sound is generated through a swing operation, wherein the head (H) includes: a first body ( 12/08/2011 | |
| 20110244976 | Apparatus for Analyzing a Swing of a Sporting Equipment An apparatus for sporting equipment includes a housing. An inlet orifice is disposed on a first side of the housing for enabling a volume of air to enter the housing in response to the housing being passed through the air generally about a plane defining a swing. An exh... | 10/06/2011 |
| 20090105004 | INERTIALLY RESPONSIVE GOLF CLUB HEAD MOUNTED DEVICE FOR INSTRUCTING CORRECT CLUB FACE DIRECTION & SWING SPEED A device for a golf club for instructing club face orientation for a selected swing speed including a body with a selected thickness and such that a substantially pointed forward end thereof intersects a midpoint of the club contact face and in a perpendicularly extendi... | 04/23/2009 |
| 20080200275 | SHORT GAME TRAINING DEVICE FOR USE WITH GOLF CLUB A short game training device 10 for use with a golf club comprises an two-axis linear accelerometer 12, a fastener 50 for removably attaching the accelerometer to the golf club head H so that the X and Y axes of the accelerometer 12 are dispo... | 08/21/2008 |
| 20080066545 | Speed measuring device A device is mounted to a support, optionally a wearable support such as a glove, watch, wrist or arm band, or the like. Alternatively, the support is incorporated into a sports club or is a removable attachment for a sports club. The device includes a speed measuring de... | 03/20/2008 |
| 20050192112 | Golf swing assistance apparatus A golf swing assistance apparatus provides a golfer with a sound and a vibration, which a metal ball and an impact plate generate at both the top of a back swing and at a finish, during a golf swing, so that he/she can be informed of a period of time during which the sw... | 09/01/2005 |
