G09B 23/181
For electric and magnetic fields
Official title: {for electric and magnetic fields; for voltages; for currents}
G09B23/181 (For electric and magnetic fields) appears on 34 US grants and 34 published applications in this corpus.
Search patents in G09B- Granted patents
- 34
- Published applications
- 34
- Assignees
- 23
- Inventors
- 90
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 3 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 4 | 2 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 4 |
| 2015 | 1 | 0 |
| 2016 | 2 | 3 |
| 2017 | 1 | 0 |
| 2018 | 0 | 6 |
| 2019 | 4 | 2 |
| 2020 | 3 | 1 |
| 2021 | 3 | 5 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 2 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
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- Electrical circuit training apparatus16 Mar 2021US 10,950,142 B2
- Wirelessly powered modular toy12 Dec 2024US 2024/0408506 A1Leo Digital (Hong Kong) Company Limited
- Modular frames for arrangement and orientation of geometric solids19 Sep 2024US 2024/0312367 A1Ark Crystal, LLC
- Multidimensional demonstration method and device for ferrofluid21 Dec 2023US 2023/0410685 A1
- Modular frames for arrangement and orientation of geometric solids25 Nov 2021US 2021/0366310 A1Ark Crystal, LLC
- Mechanical analog of electronics4 Nov 2021US 2021/0343184 A1
Most cited
By later US patents
- Apparatus for demonstrating magnetic force26US 4,267,647 A1981
- Ferrofluid sculpting apparatus17US 6,290,894 B1Ferrofluidics Corporation · 2001
- Techniques for expeditiously predicting electromagnetic wave propagation15US 5,623,429 ALucent Technologies Inc. · 1997
- Method of operating ferrous toy13US 4,364,196 A1982
- Magnetically powered spinning magnet8US 7,791,441 B12010