G02B 21/247
Differential detectors
Official title: {Differential detectors}
G02B21/247 (Differential detectors) appears on 40 US grants and 37 published applications in this corpus.
Search patents in G02B- Granted patents
- 40
- Published applications
- 37
- Assignees
- 32
- Inventors
- 89
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 3 |
| 2005 | 2 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 4 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 3 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 3 |
| 2013 | 2 | 0 |
| 2014 | 1 | 4 |
| 2015 | 0 | 5 |
| 2016 | 6 | 3 |
| 2017 | 2 | 4 |
| 2018 | 2 | 0 |
| 2019 | 4 | 2 |
| 2020 | 1 | 0 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Semiconductor inspection tool and methods of operation22 Sep 2026US 12,742,954 B2Taiwan Semiconductor Manufacturing Company.Ltd
- System and method for adjusting the alignment of a light sheet microscope8 Sep 2026US 12,730,297 B2Consiglio Nazionale Delle Ricerche
- Systems, devices and methods for automatic microscope focus24 Oct 2023US 11,796,785 B2Nanotronics Imaging, Inc.
- Systems, devices and methods for automatic microscope focus6 Dec 2022US 11,520,133 B2Nanotronics Imaging, Inc.
- Digital microscope apparatus, method of searching for in-focus position thereof, and program26 Oct 2021US 11,156,823 B2Sony Corporation
- System and method for adjusting the alignment of a light sheet microscope9 Apr 2026US 2026/0099038 A1Consiglio Nazionale Delle Ricerche
- Semiconductor inspection tool and methods of operation4 Dec 2025US 2025/0370238 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Microscope focus control system29 Feb 2024US 2024/0069319 A1Cairn Research Limited
- Systems, devices and methods for automatic microscope focus13 Apr 2023US 2023/0113528 A1Nanotronics Imaging, Inc.
- Systems, devices and methods for automatic microscope focus14 Jan 2021US 2021/0011271 A1Nanotronics Imaging, Inc.
Most cited
By later US patents
- Embedded interferometer for reference-mirror calibration of interferometric microscope62US 6,545,761 B1Veeco Instruments Inc. · 2003
- Apparatus for automatically focusing objects to be viewed in optical instruments40US 4,595,829 AErnst Leitz Wetzlar GmbH · 1986
- Automatic focusing device for reflected light microscopes25US 4,737,022 ACarl-Zeiss-Stiftung · 1988
- Apparatus for detecting an in-focus position of a substrate surface having a movable light intercepting member and a thickness detector18US 5,483,079 ANikon Corporation · 1996
- Microscope autofocus system15US 4,687,913 AWarner Lambert Technologies, Inc. · 1987