G01D 5/35393
Using frequency division multiplexing
Official title: {using frequency division multiplexing}
G01D5/35393 (Using frequency division multiplexing) appears on 29 US grants and 33 published applications in this corpus.
Search patents in G01D- Granted patents
- 29
- Published applications
- 33
- Assignees
- 14
- Inventors
- 55
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 2 | 0 |
| 2017 | 0 | 1 |
| 2018 | 4 | 2 |
| 2019 | 4 | 7 |
| 2020 | 5 | 5 |
| 2021 | 5 | 5 |
| 2022 | 1 | 1 |
| 2023 | 2 | 2 |
| 2024 | 1 | 1 |
| 2025 | 2 | 2 |
| 2026 | 2 | 2 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Post-processing method to extend the functional range of optical backscatter reflectometry in extreme environments22 Sep 2026US 12,742,691 B2UT-Battelle, LLC
- Optical path testing device and optical path testing method11 Aug 2026US 12,704,403 B2NTT, Inc.
- Redundant core in multicore optical fiber for safety9 Sep 2025US 12,411,278 B2Intuitive Surgical Operations, Inc.
- Methods and apparatus for OFDR interrogator monitoring and optimization29 Jul 2025US 12,372,344 B2Intuitive Surgical Operations, Inc.
- Distributed fiber-optic acoustic sensing system and signal processing method using the same2 Apr 2024US 11,946,799 B2Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences
- Optical time-domain reflectometer, and method for eliminating interference fading8 Oct 2026US 2026/0309523 A1Accelink Technologies Co., Ltd.
- Optical path testing device and optical path testing method12 Feb 2026US 2026/0043685 A1NTT, Inc.
- Redundant core in multicore optical fiber for safety4 Dec 2025US 2025/0369745 A1Intuitive Surgical Operations, Inc.
- Methods and apparatus for ofdr interrogator monitoring and optimization23 Oct 2025US 2025/0327658 A1Intuitive Surgical Operations, Inc.
- Post-processing method to extend the functional range of optical backscatter reflectometry in extreme environments21 Mar 2024US 2024/0094063 A1UT-Battelle, LLC
Most cited
By later US patents
- Fibre optic distributed sensing22US 9,435,668 B2Optasense Holdings Limited · 2016
- Apparatus for deriving measurement signals from fibre optic distributed sensors20US 9,909,903 B2Optasense Holdings Limited · 2018
- Determining structural tomographic properties of a geologic formation11US 10,444,065 B2Saudi Arabian Oil Company · 2019
- Redundant core in multicore optical fiber for safety7US 10,545,283 B2Intuitive Surgical Operations, Inc. · 2020
- Methods and apparatus for OFDR interrogator monitoring and optimization6US 10,782,121 B2Intuitive Surgical Operations, Inc. · 2020