Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 4528521 | Precision control frequency synthesizer having an unstable, variable frequency input signal The subject invention is a precision controlled frequency synthesizer which is capable of precisely adjusting the frequency of an output signal to maintain a desired frequency difference between an input and output signal regardless of the stability of th... | 07/09/1985 |
| 4516250 | Frequency and phase comparator with slip detection capability A frequency and phase comparator circuit for determining the frequency difference between a reference signal of a known frequency and a variable signal of unknown frequency. The subject circuit monitors the two signals and detects the occurrence of phase ... | 05/07/1985 |
| 4414537 | Digital data entry glove interface device A man-machine interface is disclosed for translating discrete hand positions into electrical signals representing alpha-numeric characters. The interface comprises a glove having sensors positioned with respect to the hand for detecting the flex of finger... | 11/08/1983 |
| 4370743 | Time division switching system A multimodule time division switching system is disclosed in which intermodule calls are served by transmitting call information words over a bus system interconnecting all modules. Each transmitted word contains information specifying the receiving modul... | 01/25/1983 |
| 4340960 | Time division switching system A multimodule time division switching system is disclosed having facilities for the serving of conference calls between port circuits in at least three different modules. Each module serving a conference call transmits a series of call data words to the o... | 07/20/1982 |
| 3978456 | Byte-by-byte type processor circuit A microprogrammed processor which receives 16-bit words as input data from an I/O system, breaks down each received word into four 4-bit bytes, and performs all logical and arithmetic operations on a byte-by-byte basis. The processed bytes may either be s... | 08/31/1976 |
| 3978294 | Return answer-supervisory circuit A PBX system is disclosed having a return answer supervisory circuit in a local PBX for automatically detecting and extending an answer indication from a called station located in a distant PBX to an attendant's console in the local PBX on tie trunk calls... | 08/31/1976 |
| 3967073 | PBX automatic number identification system A PBX is disclosed having automatic number identification (ANI) equipment for generating signals which identify the calling station and trunk numbers of outgoing calls. A memory is interconnected with the ANI equipment for storing the identification signa... | 06/29/1976 |
