Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7413845 | Elimination of write head plating defects using high activation chemically amplified resist Methods of forming a component of a thin film magnetic head and improving the plating of a component of a thin film magnetic head are provided. The methods include the use of a high activation energy chemically amplified photoresist (CARS) that is contacted with a l... | 08/19/2008 |
| 6946805 | Controller for a light display A controller for controlling decorative light displays includes plural outlet ports for providing power to a plurality of decorative light strings. The controller alternately illuminates and dims the different lights strings according to a variety of synchronized pa... | 09/20/2005 |
| 5146139 | Controllable gas discharge lighting system An inverter-type fluorescent lamp ballast is powered from the power line by way of a common and either of two (or more) different power leads. When powering the ballast by way of the common and the first one of these two power leads, the power provided to... | 09/08/1992 |
| 5003233 | Radio frequency powered large scale display A large scale video display has a plurality of colored electrodeless lamps which are excited by RF energy coupled from a RF cavity upon which the lamps are mounted. The lamps are easily replaced and do not degrade as fast as conventional lamps which have ... | 03/26/1991 |
| 4992705 | Fluorescent lighting system A fluorescent lighting system capable of providing three levels of illumination includes a first circuit in which a line voltage supply is connected to an electronic ballast which drives four fluorescent lamps. Each fluorescent lamp serves as the center l... | 02/12/1991 |
| 4888526 | Operating system for sun tanning apparatus An operating system for a sun tanning apparatus comprises an array of multiple parallel-oriented fluorescent lamps and an electronic frequency converter adapted to convert ordinary 60 Hz power line voltage into a 350 Volt/30 kHz sinusoidal voltage provide... | 12/19/1989 |
| 4792731 | Multi-room controlled for individual light controls A multi-room controller for controlling a plurality of individual light controls, each associated with a room of a partitionable space. The individual light controls each control the light individually in the control's room. An assignment panel associated... | 12/20/1988 |
| 4181844 | Theatre lighting control system The theatre lighting control system comprises a patchboard having a plurality of receptacles mounted thereon and a switchboard associated with the patchboard and having a plurality of switches mounted thereon. The receptacles and switches on the respectiv... | 01/01/1980 |
