G11B 3/687
Testing thereof
Official title: {Testing thereof (investigating chemical or physical properties of materials G01N)}
G11B3/687 (Testing thereof) appears on 3 US grants and 0 published applications in this corpus.
Search patents in G11B- Granted patents
- 3
- Published applications
- 0
- Assignees
- 3
- Inventors
- 3
- Latest grant
- 19 Jun 1984
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for evaluating distortions in video disc recordings19 Jun 1984US 4,455,633 ARCA Corporation
- Phonograph record eccentricity tester14 Aug 1979US 4,164,075 ACapitol Records, Inc.
- Detector for distinguishing between recorded and unrecorded bands of a phonograph record14 Mar 1978US 4,079,261 AMinnesota Mining and Manufacturing Company
No published applications in this class yet.
Most cited
By later US patents