Invention Grant
US5718641A Golf club head that makes a sound when striking the ball 失效
高尔夫球杆头在打球时发出声音

Golf club head that makes a sound when striking the ball
Abstract:
A golf club head having a perforated sound plate suspending inside a hollow casing thereof, the perforated sound plate being vibrated to make a sound when the golf club head strikes the ball.
Information query
Patent Agency Ranking
0/0