Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 6836207 | Strip conductor having an additional layer in a curved section A strip conductor comprises a first layer with at least one curved section. At least one region of the curved section provided with an additional layer having a smaller resistivity than the first layer. The at least one region is constructed such that resistance on ... | 12/28/2004 |
| 5631623 | Chip-type variable resistor A chip-type variable resistor is provided which includes an insulating substrate formed with a resistor strip which is arcuate at least partially and has both ends electrically connected to respective extremity electrode terminals, an intermediate termina... | 05/20/1997 |
| 4694272 | Electric potentiometer An electric potentiometer including a wiper lever having brush wipers, which upon a rotational movement about a pivot shaft sweep over electrically conductive layers applied to a carrier plate. A resistor layer is joined at one end to a connection layer a... | 09/15/1987 |
| 4500866 | Electric potentiometer An electric potentiometer is proposed which serves to convert a mechanical movement into an electrical value. The potentiometer includes a pickup embodied as a wiper and a resistor pad which has a plurality of connections for parallel resistors distribute... | 02/19/1985 |
| 4443691 | Electrically heated window An electrically heated window is disclosed which achieves a more uniform current density at the interface between the resistive heating layer and the current-bearing electrodes to which it is connected. In one embodiment this may be achieved by forming th... | 04/17/1984 |
| 4283704 | Variable resistor In a variable resistor of the type wherein there is formed on an insulating substrate a resistive member having wide portions and narrow portions in the sliding direction of a slide member and ends thereof wired respectively to a ground terminal and an in... | 08/11/1981 |
| 4253082 | Resistance disk A resistance disk that is so constructed that as the disk is rotated between a pair of fixed contact members, there is produced between the contacts a varying and random like resistance pattern of a character unobtainable with any other form of resistance... | 02/24/1981 |
| 4243969 | Layer resistor element A layer resistor element for use in a variable resistor has two resistance layers disposed upon each other on an insulating substrate, the lower resistance layer being provided with two comb-like sets of separating slots extending from opposite sides to f... | 01/06/1981 |
| 4237442 | Electrical resistance element for variable resistance devices An electrical resistance element for use in variable resistance devices such as trimmers and potentiometers, having two or more resistance materials on a non-conducting base. The resistance materials are aligned along a path of travel of a movable wiper o... | 12/02/1980 |
| 4137518 | Resistance disk This invention relates generally to electrical resistors and particularly to a resistor disk and contact assembly wherein by reason of the structure of the disk, the radial resistance of the disk is randomly varied to produce a random-like resistance patt... | 01/30/1979 |
| 3944962 | Variable resistance attenuator A variable-resistance attenuator having first and second resistive layers deposited upon an insulating substrate. Input and output terminals are electrically connected at spaced intervals to one of the resistive layers and a common terminal is electricall... | 03/16/1976 |
