H03B 28/00
Generation of oscillations by methods not covered by groups h03b5/00 - h03b27/00
Official title: Generation of oscillations by methods not covered by groups H03B5/00 - H03B27/00, including modification of the waveform to produce sinusoidal oscillations (analogue function generators for performing computing operations G06G7/26; use of transformers for conversion of waveform in AC-AC converters H02M5/18)
H03B28/00 (Generation of oscillations by methods not covered by groups h03b5/00 - h03b27/00) appears on 242 US grants and 130 published applications in this corpus.
Search patents in H03B- Granted patents
- 242
- Published applications
- 130
- Assignees
- 169
- Inventors
- 435
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 2 | 0 |
| 1994 | 8 | 0 |
| 1995 | 11 | 0 |
| 1996 | 6 | 0 |
| 1997 | 9 | 0 |
| 1998 | 12 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 1 |
| 2002 | 9 | 5 |
| 2003 | 10 | 6 |
| 2004 | 5 | 9 |
| 2005 | 4 | 3 |
| 2006 | 6 | 2 |
| 2007 | 1 | 5 |
| 2008 | 4 | 2 |
| 2009 | 2 | 8 |
| 2010 | 5 | 6 |
| 2011 | 5 | 7 |
| 2012 | 7 | 0 |
| 2013 | 9 | 15 |
| 2014 | 15 | 18 |
| 2015 | 14 | 5 |
| 2016 | 10 | 1 |
| 2017 | 2 | 6 |
| 2018 | 5 | 2 |
| 2019 | 5 | 7 |
| 2020 | 7 | 5 |
| 2021 | 5 | 4 |
| 2022 | 6 | 5 |
| 2023 | 2 | 1 |
| 2024 | 4 | 3 |
| 2025 | 0 | 2 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Circuit apparatus and control method15 Sep 2026US 12,738,948 B2NEC Corporation
- Integrated opto-electronic oscillator chip as microwave and millimeter-wave frequency synthesizer10 Mar 2026US 12,573,984 B2Drexel University
- Hybrid vacuum electronics communication and sensor system13 Jan 2026US 12,525,919 B2Boise State University
- Oscillator and electronic apparatus6 Jan 2026US 12,519,424 B2Seiko Epson Corporation
- Reference clock frequency correction by mixing with digitally-controlled low-frequency compensation signal26 Nov 2024US 12,155,384 B2Stathera IP Holding, Inc.
- Circuit apparatus and control method11 Jun 2026US 2026/0163575 A1NEC Corporation
- Sine-wave generator including finite impulse response filter-based harmonic cancellation12 Feb 2026US 2026/0045935 A1NXP B. V.
- Detection and identification of weak signals in a noisy environment6 Nov 2025US 2025/0343509 A1University of Central Florida Research Foundation, Inc.
- Hybrid vacuum electronics communication and sensor system31 Jul 2025US 2025/0247049 A1Boise State University
- Oscillator And Electronic Apparatus29 Aug 2024US 2024/0291433 A1Seiko Epson Corporation
Most cited
By later US patents
- Digital radio frequency receiver350US 4,893,316 AMotorola, Inc. · 1990
- Multi-channel digital transceiver and method218US 5,579,341 AMotorola, Inc. · 1996
- Multi-channel digital transceiver and method169US 5,818,883 AMotorola, Inc. · 1998
- Multi-channel transceiver having an adaptive antenna array and method168US 5,748,683 AMotorola, Inc. · 1998
- Direct digital synthesis of precise, stable angle modulated RF signal161US 5,952,895 ATropian, Inc. · 1999