Off court tennis
US7771295B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Oct 3, 2008 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Feb 4, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2071/0627
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present invention is an apparatus to provide a virtual tennis net that can be placed on any convenient surface having two movable poles each having a light source dependent thereon; at least two scanning mirrors; at least two retroflectors; at least two beam splitters; at least two photo-detectors; and an audible or visible signal device that is actuated in response to interruptions of light falling on said photo-detectors such that when a the light beam is interrupted by a tennis ball, the beam is momentarily blocked and the signal to the photo-detector is interrupted, providing a signal that is used to trigger a light or sound signal that indicates the ball did not pass over the virtual net.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.