"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 |
| 7189934 | Self-healing liquid contact switch A self-healing liquid contact switch and methods for producing such devices are disclosed. An illustrative self-healing liquid contact switch can include an upper actuating surface and a lower actuating surface each having a number of liquid contact regions thereon ... | 03/13/2007 |
| 6720507 | Multi-seal fluid conductor electrical switch device A switch device and a method of manufacture are provided that includes providing two substrates. The two substrates collectively include a fluid conductor switch device structure and a trench surrounding the fluid conductor switch device structure. An inner seal mat... | 04/13/2004 |
| 5563492 | Vehicular battery charging switch A vehicular battery charging switch comprising a tubular vial having a front end, a rear end, and a small amount of electrically conductive liquid material disposed therein; a coupling mechanism for coupling the vial to a vehicle such that its front end i... | 10/08/1996 |
| 4114006 | Mercury-wetted sealed contact switch The possibility of contact bounce in an electrical switch is minimized by transferring energy from an armature of the switch to a damping liquid. An arrangement for damping the armature by such a transfer is particularly suited for use with a mercury-wett... | 09/12/1978 |