H04M 3/303
And using pcm multiplexers
Official title: {and using PCM multiplexers, e.g. pair gain systems}
H04M3/303 (And using pcm multiplexers) appears on 113 US grants and 28 published applications in this corpus.
Search patents in H04M- Granted patents
- 113
- Published applications
- 28
- Assignees
- 72
- Inventors
- 214
- Latest grant
- 18 Nov 2014
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 11 | 0 |
| 1996 | 3 | 0 |
| 1997 | 8 | 0 |
| 1998 | 7 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 1 |
| 2002 | 5 | 4 |
| 2003 | 5 | 9 |
| 2004 | 5 | 3 |
| 2005 | 3 | 1 |
| 2006 | 4 | 3 |
| 2007 | 6 | 3 |
| 2008 | 3 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 0 |
| 2011 | 3 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
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- Device and associated method for measuring crosstalk19 Mar 2009US 2009/0073868 A1
- Arrangement for line-testing7 Feb 2008US 2008/0031424 A1Wi-LAN, Inc.
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Most cited
By later US patents
- Alarm and test system for a digital added main line169US 5,111,497 ARaychem Corporation · 1992
- Method and apparatus for determining the origin of a remote alarm indication signal162US 5,790,531 AApplied Digital Access, Inc. · 1998
- Method and apparatus for delivering secured telephone service in hybrid coaxial cable network147US 5,469,495 AU S West Advanced Technologies, Inc. · 1995
- Method and apparatus for delivering secured telephony service in a hydrid coaxial cable network75US 5,559,858 AU S West Advanced Technologies, Inc. · 1996
- Subscriber line tester72US 6,205,202 B1Yokogawa Electric Corporation · 2001