Patent application number | Description | Published |
20080287216 | Iron-type golf club head - An iron-type golf club head comprises: a main unit made of a carbon steel having a carbon content Ch (wt %) and integrally including a hosel attached to a club shaft; and a face plate made of a carbon steel having a carbon content Cf (wt %) and attached to the main unit so that the front surface of the face plate forms at least a major part of a face of the head, wherein the carbon content Cf (wt %) of the face plate is less than the carbon content Ch (wt %) of the main unit. | 11-20-2008 |
20090048048 | V-RIBBED BELT AND AUTOMOTIVE ACCESSORY DRIVE BELT DRIVE SYSTEM USING THE SAME - A V-ribbed belt B includes a plurality of V-ribs | 02-19-2009 |
20090118033 | Golf club head - A golf club head with a vibration absorber capable of absorbing unpleasant vibrations on off-center hits without absorbing agreeable vibrations on on-center hits is disclosed. The head comprises a head main body made of a metal material, and a vibration absorber made of a visco-elastic material attached to the head main body, wherein the loss tangent of the vibration absorber exhibits its maximum value within a temperature range of −20 to 50 deg. C., the loss tangent at 30 deg. C. is not less than 0.30, and the loss tangent at −40 deg. C. is less than 0.20. | 05-07-2009 |
20090149271 | Head for golf putter and golf putter - A golf putter ( | 06-11-2009 |
20090305812 | GOLF CLUB HEAD AND METHOD FOR PRODUCING THE SAME - A golf club head | 12-10-2009 |
20100029401 | IRON-TYPE GOLF CLUB SET - A set of iron-type golf clubs comprising “n” pieces of golf clubs having club heads with different loft angles and having advantages that variation in spin amount at mis-shots by long irons is small and accuracy in shots of intentionally curving a ball by short irons is high, each of the club heads having face | 02-04-2010 |
20100113180 | GOLF CLUB HEAD AND METHOD FOR MANUFACTURING THE SAME - A golf club head has a clubface for striking a ball, wherein face grooves are formed by pressing a die; a metallic skin is forming on the clubface including the interior surfaces of the face grooves so that the surface roughness Ral of the interior surfaces of the face grooves becomes not more than 0.20 micrometers; the interior surface of the face grooves is masked with a masking agent; the clubface is provided with a surface roughness of more than 0.20 micrometers by blasting abrasive; and then the masking agent is removed from the face grooves. | 05-06-2010 |
20100304884 | GOLF CLUB HEAD | 12-02-2010 |
20120108357 | PUTTER-TYPE GOLF CLUB HEAD AND PUTTER-TYPE GOLF CLUB - The present invention relates to a putter-type golf club head with a face on a front side to hit a golf ball comprising a head main portion provided with a concave portion on a side of the face, and a face insert made of elastic material attached to the concave portion of the head main portion, the face insert having a three-layer structure comprising of a first layer disposed at the front, a third layer disposed at the rear, and a second layer disposed between the first layer and the third layer, each of the first layer, the second layer, and the third layer having a hardness of h | 05-03-2012 |
20120190477 | GOLF CLUB HEAD AND METHOD FOR MANUFACTURING THE SAME - A golf club head has a clubface for striking a ball, wherein face grooves are formed by pressing a die; a metallic skin is forming on the clubface including the interior surfaces of the face grooves so that the surface roughness Ral of the interior surfaces of the face grooves becomes not more than 0.20 micrometers; the interior surface of the face grooves is masked with a masking agent; the clubface is provided with a surface roughness of more than 0.20 micrometers by blasting abrasive; and then the masking agent is removed from the face grooves. | 07-26-2012 |
20130288816 | GOLF CLUB - A golf club | 10-31-2013 |
20140155190 | GOLF CLUB | 06-05-2014 |
20150024865 | GOLF CLUB - The club length of a golf club is 43 inches or greater and 48 inches or less. A club inertia moment Ix about a swing axis is equal to or less than 6.90×10 | 01-22-2015 |
20150031467 | GOLF CLUB - A club includes a head, a shaft, and a grip. A club length L1 is 43 inches or greater and 48 inches or less. A ratio (Wh/Wc) between a head weight Wh and a club weight We is equal to or greater than 0.70. An inertia moment Ix about swing axis is 6.90×10 | 01-29-2015 |
20150087435 | GOLF CLUB | 03-26-2015 |
20150087436 | GOLF CLUB - A club length L1 of a golf club | 03-26-2015 |