G01J 2001/442
Single-photon detection or photon counting
Official title: {Single-photon detection or photon counting}
G01J2001/442 (Single-photon detection or photon counting) appears on 376 US grants and 423 published applications in this corpus.
Search patents in G01J- Granted patents
- 376
- Published applications
- 423
- Assignees
- 206
- Inventors
- 790
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 2 | 2 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 4 |
| 2013 | 0 | 6 |
| 2014 | 5 | 5 |
| 2015 | 5 | 7 |
| 2016 | 5 | 9 |
| 2017 | 17 | 17 |
| 2018 | 9 | 27 |
| 2019 | 23 | 37 |
| 2020 | 32 | 47 |
| 2021 | 44 | 52 |
| 2022 | 40 | 46 |
| 2023 | 42 | 50 |
| 2024 | 58 | 57 |
| 2025 | 41 | 29 |
| 2026 | 30 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Time-delay gating for high-performance operation of superconducting detectors6 Oct 2026US 12,754,071 B2Quantum Opus, LLC
- System and method for detecting correlations between two photons29 Sep 2026US 12,747,984 B2Qunnect, Inc.
- Light sensor29 Sep 2026US 12,748,196 B2STMicroelectronics (Alps) SAS
- Quantum-engineered superconductor metamaterial devices8 Sep 2026US 12,730,002 B2Enterprise Science Fund, LLC
- Photon counting device and photon counting method25 Aug 2026US 12,717,051 B2Hamamatsu Photonics K.K.
- Signal processing circuit and signal processing method24 Sep 2026US 2026/0287687 A1National Institute of Information and Communications Technology
- Optical Detection and Optical Switch Based on Interference between Narrow Beams24 Sep 2026US 2026/0287968 A1
- Photoelectric conversion device, photodetection system, movable object, and equipment17 Sep 2026US 2026/0276441 A1Canon Kabushiki Kaisha
- Compensated photon detector3 Sep 2026US 2026/0259079 A1Psiquantum, Corp.
- Photon detection3 Sep 2026US 2026/0259084 A1Technische Universität München
Most cited
By later US patents
- Superconducting single photon detector81US 9,500,519 B2Yale University · 2016
- Niobium-germanium superconducting photon detector65US 10,197,440 B2Psiquantum, Corp. · 2019
- Microspectrofluorimeter62US 4,744,667 AUniversity of Massachusetts · 1988
- Gated superconducting photon detector56US 10,386,229 B2Psiquantum, Corp. · 2019
- Stacked photodetector assemblies56US 10,515,993 B2Hi LLC · 2019