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Thomas Edison obtained a patent for an electrographic vote recorder.
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| Number | Title | Issue Date |
| 6470905 | Multifunctional urgent shutoff safety valves The present invention relates to the multifunctional urgent shutoff safety valve for preventing accidents such as gas explosion, fire, etc. in advance. It is installed at the gas supply path. The spool assembly run by earthquake accelerations in case of a... | 10/29/2002 |
| 6363962 | Crash valve actuator A crash valve is located in a liquid tight dispenser pan at a gasoline service station to close a conduit conveying gasoline to a gasoline dispensing unit to prevent uncontrolled flow of gasoline in the event a vehicle crashes into the dispensing unit. Th... | 04/02/2002 |
| 6276388 | Movement detector and fluid shut-off device A movement detector and fluid shut-off device, including a housing having an ingress and egress for fluid flow. The device including a valve shut-off means for selectively blocking fluid flow. The valve shut-off means includes a plunger normally urged tow... | 08/21/2001 |
| 5449015 | Shock-activated shut-off valve A shock-activated shut-off valve including a housing having an upper chamber and a lower chamber separated by a flap-gate pivotally connected to the housing, the lower chamber comprising an inlet orifice, and outlet orifice and a flap-gate stop means; a w... | 09/12/1995 |
| 4469125 | Quick release valve A quick release valve including a housing, a high pressure fluid inlet in the housing, a fluid outlet in the housing, a first plunger having a valve member at a first end thereof, a second annular plunger axially aligned with the first plunger and having ... | 09/04/1984 |
