Gramophone equipment
US4170359A · kind A · utility
1Cited by
8References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1977 |
| Grant date | Oct 9, 1979 |
| Priority date | — |
| Expiry date | Oct 7, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Gramophone equipment has a record changing mechanism including a screw arrangement which can be operated to lift and lower a record support platform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.