G02B 7/40
Using time delay of the reflected waves
Official title: using time delay of the reflected waves, e.g. of ultrasonic waves
G02B7/40 (Using time delay of the reflected waves) appears on 128 US grants and 91 published applications in this corpus.
Search patents in G02B- Granted patents
- 128
- Published applications
- 91
- Assignees
- 54
- Inventors
- 202
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 10 | 0 |
| 1980 | 10 | 0 |
| 1981 | 7 | 0 |
| 1982 | 12 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 2 | 0 |
| 2008 | 2 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 2 | 0 |
| 2016 | 1 | 5 |
| 2017 | 0 | 8 |
| 2018 | 4 | 4 |
| 2019 | 5 | 7 |
| 2020 | 8 | 10 |
| 2021 | 7 | 9 |
| 2022 | 9 | 15 |
| 2023 | 7 | 9 |
| 2024 | 7 | 7 |
| 2025 | 7 | 7 |
| 2026 | 6 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
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- Depth mapping using time-coded illumination90US 9,066,087 B2Apple Inc. · 2015
- Ultrasonic ranging system for a camera63US 4,199,246 APolaroid Corporation · 1980