H01S 5/2223
Hetero barrier blocking layers
Official title: {hetero barrier blocking layers, e.g. P-P or N-N}
H01S5/2223 (Hetero barrier blocking layers) appears on 26 US grants and 31 published applications in this corpus.
Search patents in H01S- Granted patents
- 26
- Published applications
- 31
- Assignees
- 23
- Inventors
- 91
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 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 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 2 | 1 |
| 2005 | 1 | 4 |
| 2006 | 2 | 3 |
| 2007 | 1 | 4 |
| 2008 | 1 | 3 |
| 2009 | 5 | 1 |
| 2010 | 2 | 3 |
| 2011 | 1 | 1 |
| 2012 | 3 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 3 |
| 2022 | 1 | 0 |
| 2023 | 0 | 3 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Transverse light emitting electroluminescent devices33US 4,309,670 AXerox Corporation · 1982
- Semiconductor laser and manufacturing process therefor12US 7,602,827 B2NEC Electronics Corporation · 2009
- Manufacturing method of semiconductor laser diode10US 6,821,801 B1Hitachi, Ltd. · 2004
- Optical semiconductor device8US 5,790,737 AMitsubishi Denki Kabushiki Kaisha · 1998
- Method of making optical semi-conductor device8US 5,906,753 AMitsubishi Denki Kabushiki Kaisha · 1999