B61L 3/185
Using separate conductors
Official title: {using separate conductors}
B61L3/185 (Using separate conductors) appears on 4 US grants and 0 published applications in this corpus.
Search patents in B61L- Granted patents
- 4
- Published applications
- 0
- Assignees
- 3
- Inventors
- 9
- Latest grant
- 19 Jul 1994
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 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 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Regenerative braking protection for an electrically-propelled traction vehicle19 Jul 1994US 5,331,261 AGeneral Electric Company
- Dual contacts on voltage rail9 Jan 1990US 4,892,980 AJ. N. Fauver Company, Inc.
- Railway safety system using intensity of current9 Jan 1979US 4,133,505 A
- Car signaling system15 Mar 1977US 4,012,019 AHitachi, Ltd.
No published applications in this class yet.
Most cited
By later US patents