H01H 43/308
Based on the change of electrical properties
Official title: {based on the change of electrical properties, e.g. thermistors (thermometers based on the use of electric or magnetic elements directly sensitive to heat G01K7/00)}
H01H43/308 (Based on the change of electrical properties) appears on 4 US grants and 0 published applications in this corpus.
Search patents in H01H- Granted patents
- 4
- Published applications
- 0
- Assignees
- 3
- Inventors
- 3
- Latest grant
- 25 May 1993
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Timing mechanism with a PTC thermistor25 May 1993US 5,214,310 AEmerson Electric Co.
- Timing mechanism with a PTC thermistor11 Aug 1992US 5,138,120 AEmerson Electric Co.
- Rapid turn-on, slow drop-out control arrangement9 Feb 1988US 4,724,504 AHamilton Standard Controls, Inc.
- On-off switch with time delay9 Mar 1976US 3,943,375 AGTE Sylvania Incorporated
No published applications in this class yet.
Most cited
By later US patents
- Rapid turn-on, slow drop-out control arrangement8US 4,724,504 AHamilton Standard Controls, Inc. · 1988
- On-off switch with time delay7US 3,943,375 AGTE Sylvania Incorporated · 1976
- Timing mechanism with a PTC thermistor3US 5,138,120 AEmerson Electric Co. · 1992
- Timing mechanism with a PTC thermistor3US 5,214,310 AEmerson Electric Co. · 1993