H03K 2217/94104
Using a light barrier
Official title: using a light barrier
H03K2217/94104 (Using a light barrier) appears on 32 US grants and 42 published applications in this corpus.
Search patents in H03K- Granted patents
- 32
- Published applications
- 42
- Assignees
- 29
- Inventors
- 100
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 3 |
| 2006 | 1 | 2 |
| 2007 | 1 | 2 |
| 2008 | 1 | 2 |
| 2009 | 2 | 1 |
| 2010 | 0 | 4 |
| 2011 | 2 | 0 |
| 2012 | 1 | 2 |
| 2013 | 3 | 1 |
| 2014 | 1 | 2 |
| 2015 | 2 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 3 |
| 2018 | 1 | 0 |
| 2019 | 0 | 2 |
| 2020 | 0 | 1 |
| 2021 | 1 | 3 |
| 2022 | 3 | 2 |
| 2023 | 2 | 2 |
| 2024 | 1 | 5 |
| 2025 | 3 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Ir timing calibration for a key switch25 Sep 2025US 2025/0300656 A1Logitech Europe S. A.
- Ir timing calibration for a key switch29 May 2025US 2025/0175177 A1Logitech Europe S. A.
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Most cited
By later US patents
- Position determining apparatus for coordinate positioning machine21US 6,496,273 B1Renishaw PLC · 2002
- Optical measuring apparatus for measuring objects on machines8US 6,635,894 B1Renishaw PLC · 2003
- Optical measuring apparatus for measuring objects on machines6US 6,878,953 B2Renishaw PLC · 2005
- Photo interrupter6US 8,207,517 B2Everlight Electronics Co., Ltd. · 2012
- Keyswitch5US 11,223,357 B2Darfon Electronics Corp. · 2022