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 |
| 4849681 | Battery-powered device In a device where a load (R1) is powered by a battery (6), if a detection means (10) detects a battery voltage below a first threshold value (V1) defined by an adjustable voltage source (20), a first time-measurement means (40, 50) m... | 07/18/1989 |
| 4816735 | Battery charger A battery charger is disclosed which is adapted to receive batteries of different sizes for charging. The charger comprises a separate support for each of the batteries, and different sizes of batteries are supported at different levels in the charger. A ... | 03/28/1989 |
| 4755733 | Battery charging and cycling devices A cycling device for conditioning battery cells of different types. A selor allows an operator to select the type of the cells to be conditioned. The amplitudes of trickle, discharge and charging currents are automatically selected in response to an outp... | 07/05/1988 |
| 4560915 | Electronic charging circuit for battery operated appliances An electronic charging circuit for battery operated appliances has a thermostat in physical, heat transferring contact with a battery pack to be charged, a power resistor in physical, heat transferring contact with the thermostat, the power resistor being... | 12/24/1985 |
| 4286204 | Device for controlling the charging of a storage battery A device for controlling the charging of a storage battery includes two counters (IC1, IC2) measure a minimum discharge time and a maximum charging time and are controlled by means of logic gates (2, 3) according to whether the main current is supplied or... | 08/25/1981 |
| 4210854 | Method and device for charging secondary electric batteries by primary sources A method of charging a secondary electric battery from a primary source of electric current, the secondary battery being connected to supply an intermittent load that draws a current which is greater than the primary source is capable of supplying the met... | 07/01/1980 |
| 4140958 | Battery charging apparatus A battery charging and analyzing apparatus for a nickel-cadmium battery is disclosed. The equipment utilizes a type of solid state resistor formed of a plurality of paralleled emitter follower transistors which are collectively a load for a Ni-Cid battery... | 02/20/1979 |
