G01J 2001/4252
For testing led's
Official title: {for testing LED's}
G01J2001/4252 (For testing led's) appears on 183 US grants and 217 published applications in this corpus.
Search patents in G01J- Granted patents
- 183
- Published applications
- 217
- Assignees
- 149
- Inventors
- 503
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 6 |
| 2004 | 3 | 0 |
| 2005 | 0 | 2 |
| 2006 | 4 | 6 |
| 2007 | 3 | 0 |
| 2008 | 0 | 4 |
| 2009 | 4 | 5 |
| 2010 | 4 | 6 |
| 2011 | 3 | 5 |
| 2012 | 3 | 8 |
| 2013 | 8 | 14 |
| 2014 | 10 | 15 |
| 2015 | 7 | 15 |
| 2016 | 10 | 13 |
| 2017 | 14 | 14 |
| 2018 | 6 | 11 |
| 2019 | 18 | 17 |
| 2020 | 13 | 11 |
| 2021 | 14 | 10 |
| 2022 | 13 | 15 |
| 2023 | 12 | 8 |
| 2024 | 7 | 10 |
| 2025 | 11 | 13 |
| 2026 | 9 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Synchronized testing of light emitting diodes27 Aug 2026US 2026/0251497 A1Advantest Corporation
- Test apparatus, test method, and computer program product13 Aug 2026US 2026/0235437 A1Advantest Corporation
- Inspection system and display device30 Jul 2026US 2026/0221061 A1Sharp Display Technology Corporation
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- Control method and apparatus for light sources16 Jul 2026US 2026/0206112 A1Lumileds LLC
Most cited
By later US patents
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- Light and light sensor103US 8,324,817 B2iLumisys, Inc. · 2012
- Systems and methods for calibrating light output by light-emitting diodes94US 7,482,565 B2Philips Solid-State Lighting Solutions, Inc. · 2009
- RGB primary color point identification system and method71US 6,992,803 B2Koninklijke Philips Electronics N. V. · 2006