Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 4539448 | Disconnect switch for metal-clad, pressurized-gas insulated, high-voltage switchgear installation A disconnect switch is provided for a metal-clad, pressurized-gas insulated, high-voltage switchgear installation. The disconnect switch includes: first and second contact assemblies which have a common longitudinal axis and are switchable between an open... | 09/03/1985 |
| 4414451 | Disconnect switch Disconnect switch, including a bus bar, at least one phase feed conductor being connected to the bus bar and having at least one fixed bus bar contact, a safety switch or circuit breaker, at least one outgoing conductor connected to the safety switch or c... | 11/08/1983 |
| 4413165 | Outdoor high voltage circuit breaker In order to prevent sparking or corona effects in the high voltage carrying parts of the outdoor high voltage circuit breaker, shielding electrodes are provided. The shielding electrodes are angular frames. The frames are formed of hollow cylindrical stra... | 11/01/1983 |
| 4389553 | Rotary disconnect switch Rotary disconnect switch assembly, including a metal encapsulation insulated with SF6 gas, flanges integral with the encapsulation, support insulators disposed on the flanges, a drive shaft passing through the encapsulation and having a portion... | 06/21/1983 |
| 4044210 | Fluid-blast circuit interrupter A system for interrupting high-voltage circuits including a surge-limiting resistor, a resistor switching interrupter and a power interrupter. The resistor and resistor switching interrupter are connected in series and the series combination connected in ... | 08/23/1977 |
