Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 4114138 | Selective calling circuit A selective calling circuit includes a central control code generator for generating a digital stream having repetitions of selected code words of digital information for selectively calling a plurality of remote receiving stations in this circuit. Each r... | 09/12/1978 |
| 4099163 | Method and apparatus for digital data transmission in television receiver remote control systems Method and apparatus for serial data transmission wherein each data word has a fixed bit length and each bit is transmitted during a fixed duration data period following a sync pulse. The sync pulse for each data word has a duration equal to a data period... | 07/04/1978 |
| 4087793 | Digital electronic control and switching arrangement A variable control, such as for a gain or frequency control, having a delay period and switching function at each end point, with status or level indication, is comprised of two simple switches and appropriate logic circuitry. While a first switch is clos... | 05/02/1978 |
| 4068216 | Bulb outage warning system A warning system for detecting a burned out or defective bulb for a motor vehicle is disclosed. A transmitting circuit is connected to detect current flow through the bulb to be monitored. Failure of the bulb to draw current causes the transmitting circui... | 01/10/1978 |
| 4056808 | Ultrasonic remote control receiver suitable for TV receiver Ultrasonic remote control receiver wherein reference frequency pulses are counted during a counting cycle comprising a predetermined number of received command signals, each command signal occupying a different frequency channel. At the end of each counti... | 11/01/1977 |
| 4048621 | Coding system for an alarm system and the like A system for registering and transmitting a preselected code to a receiving station which comprises a switch operable between open and closed states. An oscillator is responsive to the operation of the switch to the closed state for producing a pulse trai... | 09/13/1977 |
| 4037201 | Digital radio control An improved digital radio control including a transmitter and receiver utilizing codes in which a plurality of switches at the transmitter and receiver establish a binary serially transmitted code for energizing only a particular receiver which has its sw... | 07/19/1977 |
| 4023105 | Counter type remote control receiver producing binary outputs correlated with numerical commands of a companion remote control transmitter A remote control receiver for processing signals representative of a desired television channel number, each channel number being identified by a control signal lying in a respective band of frequencies. The channel number representative control signals a... | 05/10/1977 |
| 4006462 | Digital remote control system with signal verification A wireless remote control system has a transducer coupled to a sampling first counter for counting the frequency of incoming signals. A portion of the count distinguishes among various control signal frequencies and is supplied to a memory and a comparato... | 02/01/1977 |
| 3980956 | Counter type remote control receiver including noise immunity system A remote control receiver for processing signals representative of a plurality of commands, each command being identified by a control signal lying in a respective band of frequencies. The command-representative control signals are supplied to a counter w... | 09/14/1976 |
| 3980955 | Control device For simultaneous correction of all function adjustments of, for example, a television receiver, adjustable correcting information is stored by means of a normal function control members in a memory which is read out on operation of a function correction m... | 09/14/1976 |
| 3979562 | Decoder An improved decoder is settable to recognize the digits of a preselected code and utilizes two complementary semi-conductor digital counters. Such counters draw very little current from their operating voltage supplies unless and until an energized output... | 09/07/1976 |
| 3973242 | Digital receiver A digital receiver for receiving 8-bit permutable address code words. Before receiving each address code word the receiver must be activated by receiving five consecutive identical words of an interdigit signal of alternating 1's and 0's. The receiver mus... | 08/03/1976 |
| 3949365 | Information input device An information input device includes first and second counting means serially connected so as to be cyclically driven, a matrix circuit having row lines connected to an output from the first counting means and column lines, and a timing count value select... | 04/06/1976 |
| 3936801 | Multifrequency signal receiver timing circuit A digital timing circuit comprising integrated circuits is presented for multifrequency signal receivers in which a first counter is pulsed by a clock to generate predetermined timing intervals under the control of a second counter. The second counter seq... | 02/03/1976 |
