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Photoelectric keyboard
The invention claimed is: 1. A photoelectric keyboard for typewriters and similar machines comprising a first light transparent plate having holes extending from the ...
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Seal membrane with integral microphone support
OF THE PREFERRED EMBODIMENT Referring now to the drawings and in particular to FIG. 3, a unitarily molded seal or seal membrane 300 in accordance with the present ...
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Weatherproof electronic keypad with replaceable graphics overlay
An electronic keypad according to the invention comprises a plastic housing that includes a generally planar front wall having an outside surface and an inside surface, ...
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Splash water protected keyboard
In a splash-water protected keyboard having a contact foil arranged in a housing and a rubber mat with switch domes disposed over the contact foil and keys with contact ...
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Keyboard assembly
It is therefore an object of this invention to provide a keyboard assembly with a water-resistant structure that can strongly prevent water from entering the keyboard ...
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Tape printing apparatus
It is an object of the invention to provide a tape printing apparatus which is capable of positively discharging a cut tape strip out of the apparatus by forcibly ...
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Body composition analyzer
We claim: 1. A body composition analyzer comprising: a plurality of electrodes attachable to the body of a person, said body forming a network of unknown impedance; a ...
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Frequency regulation of an oscillator for use in MWD transmission
The present invention addresses these and other drawbacks in the art by creating an oscillating pressure using a control valve that is driven by the pressures in a mud ...
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Membrane key switch with anti-inversion feature
The present invention relates to a matrix key switch of the membrane type wherein there are laminations of dielectric film material and plastic sheet material having ...
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Precise differential voltage interpolation analog-to-digital converter having double interpolation using nonlinear resistors
To address the above-discussed deficiencies of flash analog-to-digital converters (ADC), the present invention teaches an inexpensive ADC having precise differential ...
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