Bowling ball
US4099715A · kind A · utility
5Cited by
4References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1975 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Apr 22, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B37/10
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Top weight and/or total weight are adjusted by drilling a hole into the ball along a diameter passing through the center of the top weight area and the center of gravity of total ball weight. Weighted plugs are then located at the two centers by an intervening spacer, and the hole closed by a closure cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.