G11B 15/4731
Control of headwheel rotation
Official title: {control of headwheel rotation (disposition or construction of headwheel motor G11B5/53, G11B21/02)}
G11B15/4731 (Control of headwheel rotation) appears on 128 US grants and 7 published applications in this corpus.
Search patents in G11B- Granted patents
- 128
- Published applications
- 7
- Assignees
- 33
- Inventors
- 202
- Latest grant
- 25 Dec 2012
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 7 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 12 | 0 |
| 1998 | 17 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 4 | 0 |
| 2002 | 4 | 1 |
| 2003 | 3 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 3 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 4 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Input-output circuit, recording apparatus and reproduction apparatus for digital video signal25 Dec 2012US 8,340,501 B2Hitachi Consumer Electronics Co., Ltd.
- Input-output circuit, recording apparatus and reproduction apparatus for digital video signal6 Nov 2012US 8,306,395 B2Hitachi Consumer Electronics Co., Ltd.
- Input-output circuit, recording apparatus and reproduction apparatus for digital video signal18 Sep 2012US 8,270,812 B2Hitachi Consumer Electronics Co., Ltd.
- Input-output circuit, recording apparatus and reproduction apparatus for digital video signal28 Aug 2012US 8,254,758 B2Hitachi Consumer Electronics Co., Ltd.
- Optimizing tape speed for a sync operation4 May 2010US 7,710,681 B2International Business Machines Corporation
- Input-output circuit, recording apparatus and reproduction apparatus for digital video signal4 Feb 2010US 2010/0027962 A1Hitachi Consumer Electronics Co., Ltd.
- Input-output circuit, recording apparatus and reproduction apparatus for digital video signal1 Jan 2009US 2009/0003803 A1Hitachi Consumer Electronics Co., Ltd.
- Optimizing tape speed for a sync operation11 Dec 2008US 2008/0304174 A1International Business Machines Corporation
- Input-output circuit, recording apparatus and reproduction apparatus for digital video signal27 Nov 2008US 2008/0292282 A1Hitachi Consumer Electronics Co., Ltd.
- Input-output circuit, recording apparatus and reproduction apparatus for digital video signal27 Nov 2008US 2008/0292283 A1Hitachi Consumer Electronics Co., Ltd.
Most cited
By later US patents
- Disk drive employing spindle motor commutation time variation for reducing acoustic noise144US 6,493,169 B1Western Digital Technologies, Inc. · 2002
- Transmission, recording and reproduction of digital data and time information in transport packets using a compression ratio69US 5,835,668 ASony Corporation · 1998
- Packet data system recording time stamps and packet data on tracks formed on a storage medium in synchronism with changes in time stamp values52US 6,011,899 AVictor Company of Japan, Ltd. · 2000
- Electronically commutated DC machine and use thereof49US 4,763,053 A1988
- Transmission, recording and reproduction of digital data and time information in transport packets using a compression ratio49US 5,859,949 ASony Corporation · 1999