Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7352467 | Surface plasmon resonance imaging system and method A surface plasmon resonance imaging system (40) and method is provided. The system (40) includes a light source (42) comprising a light-emitting diode (LED) array that is positioned at the focal point of a collimating lens (44). The light... | 04/01/2008 |
| 7102334 | Method and apparatus for electronic power control The method of the invention in one aspect involves electronic power control by varying the amplitude of an electrical power supply voltage, independent of frequency, whereby the output frequency will always be the same as the input frequency. An electrical circuit a... | 09/05/2006 |
| 7078866 | Plasma display panel and method for driving the same An energy recovery circuit of a plasma display panel and a drive method thereof are disclosed. A plasma display panel according to the present invention comprises an inductor for charging or discharging the panel capacitor, inductor charge path means which provides ... | 07/18/2006 |
| 7027010 | Plasma display panel, and apparatus and method for driving the same A PDP driving apparatus includes a sustain discharge unit including a first switch and a second switch connected between a first voltage and second voltage and having a contact connected to one terminal of a panel capacitor, and a third switch and a fourth switch co... | 04/11/2006 |
| 7009823 | Energy recovery circuit and energy recovery method using the same An energy recovery circuit wherein an energy stored in an inductor is applied to a panel to reduce a charge time and improve an energy recovery efficiency. In the energy recovery circuit, a switch, a capacitor and an inductor is provided to form a closed loop. A pan... | 03/07/2006 |
| 6900446 | Charged particle beam irradiation equipment and control method thereof A power supply for applying a voltage to a scanning electromagnet for deflecting a charged particle beam has a first power supply unit having no filter and a second power supply unit having a filter. When an irradiation position of the charged particle beam in an ir... | 05/31/2005 |
| 6646387 | AC-type plasma display panel having energy recovery unit in sustain driver An apparatus of a sustain driver in an AC-type plasma display panel having an energy recovery unit, comprising: a first drive unit for driving one electrode of a panel capacitor to a sustain voltage or a ground voltage; a second drive unit for driving ano... | 11/11/2003 |
| 5640061 | Modular lamp power supply system A modular lamp power supply is adapted to provide lamp power supply signals to a plurality of different lamps, each lamp having different power requirements. The power supply can be reconfigured to supply power to a new group of lamps simply by replacing ... | 06/17/1997 |
| 4999752 | Electric lamp with multiple power connectors A light fixture assembly having both AC and DC lamps, as well as AC and DC power receptacles that is capable of operating from either an AC source or a DC source. A 110-volt AC lamp, as well as a 12-volt DC lamp are provided within a reflector housing. Th... | 03/12/1991 |
| 4749908 | Emergency power supply An emergency power supply including an input for connection to a power line, an output for connecting the input to electrical equipment so as to supply power thereto from the power line, a supplemental power supply connected to the output and adapted to s... | 06/07/1988 |
| 4529914 | High intensity discharge lamp ignition system A high intensity discharge (HID) lamp has an arc tube including a pair of main electrodes and at least one auxiliary electrode or probe, wherein a high frequency (HF) high voltage is applied to the probe for forming a high frequency (HF) ignition discharg... | 07/16/1985 |
| 4518896 | Dual voltage lighting fixture A dual voltage lighting fixture for permiting the interchangeable use of light bulbs having substantially different operating voltages. The apparatus includes a housing to which is mounted a standard sized light bulb socket and a connector. A transformer ... | 05/21/1985 |
| 4430738 | Arrangement for the current limitation during the current supply of electrically excited gas lasers An arrangement for the current limitation during the current supply of electrically excited gas lasers includes a rotary current transformer, self-inductances provided in front of a rotary current bridge rectifier, and a capacitor, if desired. In each pha... | 02/07/1984 |
