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 |
| 4630139 | Data synchronization The data synchronizer overcomes problems with mismatched recording and analyzing equipment and can be used for multiple channel recording. By preliminary analysis a reference point is located on the record signal and used to trigger the data processor. Ea... | 12/16/1986 |
| 4627102 | Squelch circuit A squelch circuit in which a phase locked loop (PLL) (5) having a voltage controlled oscillator (VCO) (7) and a phase comparator (10) is used to detect the number of zero crossings, these being low for a speech signal and high for noise. The error voltage... | 12/02/1986 |
| 4605453 | Firing cap composition containing lead styphnate A conducting composition suitable for use in a firing cap is disclosed. The conducting composition comprises normal lead styphnate which has a mean particle size not less than 55 microns, in admixture with carbon black which has a mean aggregate size betw... | 08/12/1986 |
| 4586387 | Flight test aid A flight test aid comprising means to measure force that is applied by a pilot to the controls (7) of an aircraft to adjust the control surfaces while manoeuvering the aircraft which utilizes a plurality of sensors (5-6) supported in the interface between... | 05/06/1986 |
| 4575718 | Component state monitoring Apparatus suitable for use with an operative system for monitoring the operational state of at least one system component such as a valve, which can adopt three possible states. The apparatus includes a state signal generator for operative association wit... | 03/11/1986 |
| 4539701 | Photogrammetric stereoplotter A photogrammetric stereoplotter using a stereoscopic binocular unit (1) to provide an image of spatially separated masters (4,5) and including a cursor (6) providing X Y coordinates and measuring marks providing Z coordinates in which the X Y Z coordinate... | 09/03/1985 |
| 4522209 | Cochlear prosthesis test system A test system for a sealed, sterile package containing a cochlear prosthesis electrode. A light-emitting diode has its two leads in contact with at least two different conducting bands on the electrode. The prosthesis, which is externally-powered, is oper... | 06/11/1985 |
| 4516820 | Cochlear prosthesis package connector A cochlear prosthetic package having an electronics part and an electrode part. The two parts have ceramic plates with aligned, hermetically-sealed hollow-pin feedthroughs therein. The parts are connected by a Silastic sheet having individual metal foil p... | 05/14/1985 |
| 4484196 | Antenna drive arrangement for very high frequency omidirectional range navigation system An antenna drive arrangement for a very high frequency omnidirectional range (VOR) navigation system for aircraft. The antenna has two vertically arrayed antenna elements located above a ground plane, and reference and variable phase signals are distribut... | 11/20/1984 |
| 4451830 | VHF Omni-range navigation system antenna An antenna which is suitable for use in a very high frequency omni-directional range (VOR) navigation system for aircraft. The antenna is driven to radiate reference and variable phase signals which provide flight bearing information to an aircraft which ... | 05/29/1984 |
| 3976270 | Detection of surface ice accretion This specification discloses an ice accretion detector for aircraft comprising a sensing hole or port formed in part of the aircraft structure where icing is known to occur and connected to the key control port of a OR/NOR fluidic key and an air supply su... | 08/24/1976 |
| 3939696 | Scanning ultrasonic inspection method and apparatus Apparatus for pulse-echo ultrasonic examination, particularly in medical diagnostic examination, is comprised of a plurality of transducers spaced at fixed positions around the object to be examined, each of the transducers being steerable to direct pulse... | 02/24/1976 |
