| 发明名称 |
Testing device for tennis racquets |
| 摘要 |
PCT No. PCT/CH82/00034 Sec. 371 Date Nov. 22, 1982 Sec. 102(e) Date Nov. 22, 1982 PCT Filed Mar. 4, 1982 PCT Pub. No. WO82/03274 PCT Pub. Date Sep. 30, 1982.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.
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| 申请公布号 |
US4488444(A) |
申请公布日期 |
1984.12.18 |
| 申请号 |
US19820449010 |
申请日期 |
1982.11.22 |
| 申请人 |
WEIDMANN, ULRICH;WEBER, HANS R. |
发明人 |
WEIDMANN, ULRICH;WEBER, HANS R. |
| 分类号 |
G01L5/06;G01M5/00;G01N3/20;G01N33/00;(IPC1-7):G01L5/06 |
主分类号 |
G01L5/06 |
| 代理机构 |
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