H04Q 1/20
Testing circuits or apparatus
Official title: Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles
H04Q1/20 (Testing circuits or apparatus) appears on 208 US grants and 77 published applications in this corpus.
Search patents in H04Q- Granted patents
- 208
- Published applications
- 77
- Assignees
- 138
- Inventors
- 451
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 8 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 10 | 0 |
| 1995 | 11 | 0 |
| 1996 | 5 | 0 |
| 1997 | 8 | 0 |
| 1998 | 7 | 0 |
| 1999 | 12 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 0 |
| 2002 | 4 | 2 |
| 2003 | 3 | 5 |
| 2004 | 6 | 5 |
| 2005 | 2 | 5 |
| 2006 | 5 | 8 |
| 2007 | 9 | 7 |
| 2008 | 2 | 3 |
| 2009 | 4 | 4 |
| 2010 | 7 | 2 |
| 2011 | 2 | 0 |
| 2012 | 2 | 2 |
| 2013 | 1 | 0 |
| 2014 | 3 | 2 |
| 2015 | 3 | 3 |
| 2016 | 5 | 2 |
| 2017 | 2 | 2 |
| 2018 | 3 | 5 |
| 2019 | 4 | 8 |
| 2020 | 6 | 6 |
| 2021 | 4 | 3 |
| 2022 | 4 | 1 |
| 2023 | 1 | 1 |
| 2024 | 3 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Information processing apparatus, information processing method, computer-readable recording medium, and information processing system15 Apr 2025US 12,279,081 B2Yokogawa Electric Corporation
- Port-to-port visual identification system29 Oct 2024US 12,133,031 B1
- Protection circuit and server system18 Jun 2024US 12,015,260 B2Shenzhen Fulian Fugui Precision Industry Co., Ltd.
- Port occupancy detection for high density panels16 Apr 2024US 11,962,955 B2CommScope Technologies LLC
- Real-time multi-dimensional monitoring of environmental parameters7 Feb 2023US 11,575,979 B1Amazon Technologies, Inc.
- Port-to-Port Visual Identification System20 Mar 2025US 2025/0097610 A1
- Protection circuit and server system25 May 2023US 2023/0163585 A1Shenzhen Fulian Fugui Precision Industry Co., Ltd.
- Information processing apparatus, information processing method, computer-readable recording medium, and information processing system22 Sep 2022US 2022/0303649 A1Yokogawa Electric Corporation
- Port occupancy detection for high density panels9 Dec 2021US 2021/0385559 A1CommScope Technologies LLC
- Communication node18 Nov 2021US 2021/0360335 A1Molex Incorporated
Most cited
By later US patents
- Optical switching apparatus and method for use in the construction mode testing of a modular fiber administration system180US 5,694,511 ALucent Technologies Inc. · 1997
- Alarm and test system for a digital added main line169US 5,111,497 ARaychem Corporation · 1992
- Optical fiber distribution module for holding an optical fiber cord and fiber distribution system using optical fiber cords138US 6,256,443 B1Nippon Telegraph and Telephone Corporation · 2001
- Digital telecommunication network cross-connect module having a printed circuit board connected to jack switches127US 5,233,501 ATelect, Inc. · 1993
- High-speed facility protection in a digital telecommunications system127US 5,329,520 AAlcatel Network Systems, Inc. · 1994