Sigma Instruments, Inc.
Cranberry Township, PA, US· latest recorded location
Sigma Instruments, Inc. is named on 37 US grants and 0 published applications in this corpus. Its most frequent classification is G01R (Measuring electric variables).
- Granted patents
- 37
- Published applications
- 0
- Inventors
- 20
- Granted in 2026 so far
- 0
- Most recent grant
- 10 Oct 2006
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 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 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
By publication year.
Technology areas
Share of 37 documents
- G01RMeasuring electric variables11
- H02KDynamo-electric machines8
- H02HEmergency protective circuit arrangements7
- H02PControl or regulation of electric motors, electric generators or dynamo-electric converters4
- H03KPulse technique2
- Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests2
- A61BMedical diagnosis and surgery1
- B65HHandling thin or filamentary material1
- D04BKnitting1
- F21VFunctional features or details of lighting devices or systems thereof1
Recent patents
- Personal massager10 Oct 2006US D530,019 S1Design
- Device and process for measurement and treatment of spinal mobility25 Mar 2003US 6,539,328 B1
- Faulted current indicator with protection against temporary overloads and transients4 Aug 1992US 5,136,456 A
- Power line post insulator with dual inductor current sensor23 Jun 1992US 5,124,642 A
- Fault indicator with timing control5 May 1992US 5,111,189 A
No published applications.
Most cited
By later US patents