Putter face and golf putter having the same
US8109841B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 2010 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Dec 30, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2209/00
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A putter face includes microscopic protrusions which have stiffness higher than that of a golf ball and which are smaller than intervals between dimples of the golf ball, each of the microscopic protrusions having an end having a protrusion front edge surface formed in a planar shape, a periphery of the protrusion front edge surface including linear portions facing each other and curve portions facing each other, the linear portions extending in a horizontal direction of a face plane of the putter face or striking the golf ball, the periphery of the protrusion front edge surface forming a racetrack shape (i) which is defined by a pair of the linear portions facing each other and a pair of the curve portions facing each other and (ii) which has a shorter diameter of not less than 0.1 mm but not more than 0.2 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.