"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 7037615 | Trapping method and system for energy conversion devices A trap for an energy conversion device comprises a trapping system comprising a filter element and a trap element, and fluidly coupled to a reforming system. The trapping system is monitored by a combination of devices including an on-board diagnostic system, a temp... | 05/02/2006 |
| 4961519 | Lime feeder A lime feeder includes a metering driving vessel divided into two chambers arranged below a water inlet so that, alternatively one and the other chamber is filled with water and tilts between two end positions. The tilting movement is conducted by a carri... | 10/09/1990 |
| 4550745 | Device for discharging a mixture of two liquids This invention relates to a device for the constant replenishment of an animal dipping bath, or for use in any situation where it is desired to have a concentrate diluted with a liquid with little or no liquid supply pressure. The device consists of a two... | 11/05/1985 |
| 4463736 | Chambered rotary metering device A fluid metering device is provided including a chambered rotor for metering correctly proportioned mixtures of air and a vaporized fuel to an internal combustion engine. The rotor includes radially disposed chambers and is enclosed in a housing having an... | 08/07/1984 |