G01R 21/1273
Measuring real component
Official title: {Measuring real component}
G01R21/1273 (Measuring real component) appears on 6 US grants and 1 published applications in this corpus.
Search patents in G01R- Granted patents
- 6
- Published applications
- 1
- Assignees
- 4
- Inventors
- 5
- Latest grant
- 22 Jul 2003
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Electronic device22 Jul 2003US 6,597,230 B2Koninklijke Philips Electronics N. V.
- Switched-capacitor watthour meter circuit having reduced capacitor ratio24 Jan 1989US 4,800,333 AGeneral Electric Company
- Watt-hour meter1 Nov 1988US 4,782,287 ASigma Instruments, Inc.
- Electronic watthour meter26 Jun 1984US 4,456,878 ATokyo Shibaura Denki Kabushiki Kaisha
- Single phase 3-wire electronic electrical energy meter1 Jun 1976US 3,961,257 AGeneral Electric Company
Most cited
By later US patents
- Switched-capacitor watthour meter circuit having reduced capacitor ratio13US 4,800,333 AGeneral Electric Company · 1989
- Watt-hour meter11US 4,782,287 ASigma Instruments, Inc. · 1988
- Electronic watthour meter10US 4,456,878 ATokyo Shibaura Denki Kabushiki Kaisha · 1984
- Single phase 3-wire electronic electrical energy meter9US 3,961,257 AGeneral Electric Company · 1976
- Multi-wire electronic kWh meter8US 3,934,198 AGeneral Electric Company · 1976