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"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 |
| 7138945 | Method and apparatus for selecting a foghorn blast pattern A marine vessel (102) is operable to emit an audible signal based upon the velocity status of the marine vessel (102). The marine vessel (102) includes a first processor component (340) operable to determine the velocity of the vehicle ba... | 11/21/2006 |
| 6993971 | Ultrasonic inspection device for inspecting components at preset angles There is provided an ultrasonic inspection device that provides a locking mechanism for inspecting components at preset angles. The inspection device can inspect a component along an arc by inspecting the component at each preset angle, which provides complete and r... | 02/07/2006 |
| 5642445 | System for determining an interior or exterior acoustic noise level of an enclosed structure and noise reduction device incorporating such system The acoustic noise monitor determines acoustic sound levels radiated or stered to an exterior or interior fluid space of a structure such as an enclosed structure by measuring a condition, such as strain level, of the structure itself rather than by dire... | 06/24/1997 |
| 4887693 | Wind and breath noise protector for microphones A construction for housing a microphone is disclosed. The construction is configured to improve the wind and noise protection for a small diameter microphone by providing a large diameter opening tapering to a smaller microphone aperture. The construction... | 12/19/1989 |
| 4605924 | Method and apparatus for acoustically monitoring an industrial plant Acoustic waves are sensed in contact with or near the plant at at least two points (1, 2, 3, 4) whose position is accurately determined with respect to the monitored region. The order of arrival of the acoustic waves at the sensing points (1, 2, 3, 4) is ... | 08/12/1986 |
| 4583405 | Testing device This invention is a fluorescent light testing device. It is difficult to determine which fluorescent light or lights may be weak or on the verge of failing when a plurality of lights are disposed in the same general area. This is particularly true when th... | 04/22/1986 |
| 4309576 | Listening device for localizing underground water leakages A listening device for pinpointing water leakages, which includes a manually operated rod having a handle at one end for manually positioning of the listening device. An acoustic pick-up apparatus is mounted on the other end of the rod, and it comprises a... | 01/05/1982 |
| 4245430 | Voice responsive toy A sound responsive toy which seeks an emitted sound such as a child's voice, the toy includes control circuitry for activating an associated drive to turn and/or guide the toy toward the child's voice.... | 01/20/1981 |
| 3999626 | Apparatus and seismic method A seismic generator for communicating from either above or below the surface of the earth is disclosed. The generator includes a system of eccentrically weighted masses such as, for example, unbalanced flywheels, which can be rotated to produce a seismic ... | 12/28/1976 |
