H04B 10/505
Using external modulation
Official title: {using external modulation}
H04B10/505 (Using external modulation) appears on 1,831 US grants and 1,817 published applications in this corpus.
Search patents in H04B- Granted patents
- 1,831
- Published applications
- 1,817
- Assignees
- 525
- Inventors
- 2,831
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 9 | 0 |
| 1992 | 8 | 0 |
| 1993 | 7 | 0 |
| 1994 | 14 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 7 | 0 |
| 1998 | 21 | 0 |
| 1999 | 23 | 0 |
| 2000 | 25 | 0 |
| 2001 | 38 | 7 |
| 2002 | 31 | 53 |
| 2003 | 39 | 70 |
| 2004 | 34 | 82 |
| 2005 | 26 | 78 |
| 2006 | 60 | 57 |
| 2007 | 42 | 69 |
| 2008 | 71 | 59 |
| 2009 | 51 | 59 |
| 2010 | 60 | 75 |
| 2011 | 56 | 56 |
| 2012 | 52 | 67 |
| 2013 | 54 | 55 |
| 2014 | 74 | 68 |
| 2015 | 74 | 69 |
| 2016 | 85 | 70 |
| 2017 | 84 | 90 |
| 2018 | 98 | 105 |
| 2019 | 123 | 102 |
| 2020 | 112 | 105 |
| 2021 | 90 | 82 |
| 2022 | 83 | 90 |
| 2023 | 83 | 88 |
| 2024 | 74 | 67 |
| 2025 | 57 | 52 |
| 2026 | 41 | 42 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04B 10/5057Using a feedback signal generated by analysing the optical output603
- H04B 10/5053Using a parallel, i.e. shunt, combination of modulators448
- H04B 10/5051Using a series, i.e. cascade, combination of modulators275
- H04B 10/5055Using a pre-coder200
- H04B 10/5059Using a feed-forward signal generated by analysing the optical or electrical input161
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Most cited
By later US patents
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- Chirped-pulse multiple wavelength telecommunications system147US 5,631,758 ALucent Technologies Inc. · 1997
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