H04B 10/035
Using loopbacks
Official title: using loopbacks
H04B10/035 (Using loopbacks) appears on 99 US grants and 75 published applications in this corpus.
Search patents in H04B- Granted patents
- 99
- Published applications
- 75
- Assignees
- 54
- Inventors
- 187
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 4 |
| 2003 | 1 | 1 |
| 2004 | 3 | 4 |
| 2005 | 0 | 0 |
| 2006 | 2 | 0 |
| 2007 | 3 | 0 |
| 2008 | 4 | 1 |
| 2009 | 0 | 8 |
| 2010 | 2 | 1 |
| 2011 | 3 | 1 |
| 2012 | 4 | 2 |
| 2013 | 2 | 2 |
| 2014 | 1 | 4 |
| 2015 | 4 | 2 |
| 2016 | 4 | 4 |
| 2017 | 5 | 2 |
| 2018 | 4 | 3 |
| 2019 | 5 | 8 |
| 2020 | 5 | 4 |
| 2021 | 3 | 6 |
| 2022 | 7 | 5 |
| 2023 | 3 | 6 |
| 2024 | 6 | 2 |
| 2025 | 4 | 3 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optical communication device and optical communication system30 Dec 2025US 12,512,909 B2Fanuc Corporation
- Optical tapping in an indexing architecture7 Oct 2025US 12,438,609 B2CommScope Technologies LLC
- System for detecting circuit anomalies in trailer wiring6 May 2025US 12,292,465 B2Grote Industries, Inc.
- Burst optical relaying device and burst optical relaying method7 Jan 2025US 12,191,904 B2Nippon Telegraph and Telephone Corporation
- Systems, methods, and storage media for detecting a security intrusion of a network device3 Dec 2024US 12,160,320 B2Level 3 Communications, LLC
- System for detecting circuit anomalies in trailer wiring8 Oct 2026US 2026/0309762 A1Grote Industries, Inc.
- Optical interconnects for flexible calibration of an optical transceiver in a free-space optical communication system1 Jan 2026US 2026/0005758 A1Altera Corporation
- Optical communication cable with selective communication states19 Jun 2025US 2025/0202584 A1Mellanox Technologies, Ltd.
- Visual alignment of paired electronic appliances20 Mar 2025US 2025/0096884 A1T-Mobile USA, Inc.
- Dynamic error quantizer tuning systems and methods6 Feb 2025US 2025/0047377 A1Maxim Integrated Products, Inc.
Most cited
By later US patents
- Method and apparatus for monitoring performance of optical transmission systems159US 5,513,029 ANorthern Telecom Limited · 1996
- Passive optical network with diagnostic loop-back74US 5,907,417 ALucent Technologies Inc. · 1999
- Optical transmission system, optically branching apparatus and optical signal processing apparatus48US 6,327,060 B1KDD Submarine Cable Systems Inc. · 2001
- Optical repeater44US 5,535,037 ANEC Corporation · 1996
- Optical repeater having loop-back function used in transmission system39US 5,296,957 AFujitsu Limited · 1994