Testing device for tennis racquets
US4488444A · kind A · utility
8Cited by
1References
8Claims
0Family size
Inventors
Key dates
| Filing date | Nov 22, 1982 |
| Grant date | Dec 18, 1984 |
| Priority date | — |
| Expiry date | Nov 22, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and process for separately measuring tension of strings, stiffness of frame in both strung and unstrung condition, and point of balance of a tennis racquet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.