C02F 1/487
Using high frequency electromagnetic fields
Official title: {using high frequency electromagnetic fields, e.g. pulsed electromagnetic fields}
C02F1/487 (Using high frequency electromagnetic fields) appears on 131 US grants and 160 published applications in this corpus.
Search patents in C02F- Granted patents
- 131
- Published applications
- 160
- Assignees
- 91
- Inventors
- 259
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 2 | 2 |
| 2005 | 2 | 0 |
| 2006 | 0 | 1 |
| 2007 | 2 | 7 |
| 2008 | 1 | 2 |
| 2009 | 0 | 3 |
| 2010 | 1 | 4 |
| 2011 | 3 | 2 |
| 2012 | 3 | 5 |
| 2013 | 1 | 4 |
| 2014 | 3 | 13 |
| 2015 | 3 | 11 |
| 2016 | 7 | 9 |
| 2017 | 9 | 11 |
| 2018 | 8 | 16 |
| 2019 | 10 | 14 |
| 2020 | 15 | 11 |
| 2021 | 10 | 5 |
| 2022 | 6 | 7 |
| 2023 | 4 | 6 |
| 2024 | 5 | 11 |
| 2025 | 5 | 10 |
| 2026 | 6 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Apparatus for treating liquid to prevent and/or remove scale deposits75US 5,074,998 A1991
- Apparatus for treating flowing liquid with electromagnetic flux51US 6,063,267 AClearwater Systems Corporation · 2000
- Device for neutralizing and preventing formation of scale and method48US 5,738,766 ANathan Jefferson Enterprises, Inc. · 1998
- Method and apparatus for magnetically treating a liquid43US 4,938,875 A1990
- Electronic lime controller with controls responsive to flow rates and water hardness41US 5,171,431 A1992