Swing measuring device
US4577863A · kind A · utility
39Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1983 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Jul 1, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B69/0002
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The height and inclination of a batter's swing plane are measured by a batting practice device shaped like a home plate and including a laser source and photosensors for detecting laser light reflected by the bat when swung over the plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.