H01H 33/884
With variable-area piston
Official title: {with variable-area piston}
H01H33/884 (With variable-area piston) appears on 3 US grants and 0 published applications in this corpus.
Search patents in H01H- Granted patents
- 3
- Published applications
- 0
- Assignees
- 3
- Inventors
- 6
- Latest grant
- 25 Jul 1978
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Puffer interrupter with main and auxiliary pistons and common cylinder25 Jul 1978US 4,103,131 ASprecher & Schuh Ltd. (SSA)
- Gas-blast switch8 Mar 1977US 4,011,421 ASprecher & Schuh AG
- Puffer-type gas-blast circuit-interrupter having variable-area stationary composite piston structure19 Oct 1976US 3,987,262 AWestinghouse Electric Corp.
No published applications in this class yet.
Most cited
By later US patents
- Puffer-type gas-blast circuit-interrupter having variable-area stationary composite piston structure8US 3,987,262 AWestinghouse Electric Corp. · 1976
- Puffer interrupter with main and auxiliary pistons and common cylinder3US 4,103,131 ASprecher & Schuh Ltd. (SSA) · 1978
- Gas-blast switch2US 4,011,421 ASprecher & Schuh AG · 1977