System for confirming hit locations on tennis court boundaries
US7632197B2 · kind B2 · utility
25Cited by
6References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2007 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | May 5, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2102/02
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present invention is an article and process for determining the site of impact of a movable object on a treated surface, where a tennis ball is treated with a striking composition, and a boundary line region is treated with a receiving composition such that when the striking composition and the receiving composition are in physical contact, a calorimetric indicator is left on the receiving composition to indicate the point of contact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.