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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 4924501 | Dial pulse selection A dial pulse detection system 20 has an analogue input buffer 22, an analogue to digital converter (ADC) 24, a processor 25, and an output buffer 26. Processor 25 operates on the digitally encoded samples produced by ADC 24 from the received signal to ach... | 05/08/1990 |
| 4782520 | Pulse receiver circuit providing longitudinal balance A pulse receiver for connection in a telephone circuit including two coils connected between a voltage potential and ground further including an external impedance that is alternately connected between the coils. The pulse receiver includes a first impeda... | 11/01/1988 |
| 4435620 | Dial pulse delay circuit A telecommunication switching system utilizing immediate-start type trunks assures the collection of dial pulse information in receiving registers, via a network connection, by employing a dial pulse delay within each such trunk circuit for holding dial p... | 03/06/1984 |
| 4415773 | Methods of establishing a switching connection within a switching system A PBX system (20) receives a predetermined number of dialing digits from a central office which represents a subscriber station interconnected within the system. The system (20) adds a pseudo digit to the dialing digits to facilitate: (1) the use of a ful... | 11/15/1983 |
| 4297532 | Interfacing circuit status detection arrangement in a telephone exchange There is provided a telephone exchange including a switching network, a plurality of interface circuits whose corresponding transmit/receive paths are connected to the switching network, a data generator connected to the interface circuits to sequentially... | 10/27/1981 |
| 4156115 | Apparatus and method for a multiple tone code sender system for automatic call initiation A tone sender system for producing analog tone pairs for transmission of the digits comprising a telephone number. Dual codes, multi-frequency and touch calling multi-frequency, are produced to generate simulated test call originations. This tone sender s... | 05/22/1979 |
| 4103113 | Attendant console control system Key information from an attendant console is transferred to a telephone exchange in a bit serial manner, and line status information from the telephone exchange is also transferred in a bit serial manner and in a time-shared manner. At the request of the ... | 07/25/1978 |
| 4027108 | Modular register and sender arrangement A register and sender module with an internal common control provided with common addressing, storage, and timing for up to four registers, up to two senders, and up to two tone control circuits in a module. Modular construction allows addition and replac... | 05/31/1977 |
| 3999019 | Private automatic branch exchange providing line appearance connection of operator complex to single stage matrix An electronic private automatic branch exchange may avoid the need for access trunks and information trunks in the operator complex by utilizing a single stage switching matrix to effect connections between line circuits, trunk circuits, and the operator ... | 12/21/1976 |
| 3985973 | Preference access circuit A buffer circuit is disclosed as part of a centralized subsystem in a telephone switching system. The subsystem performs all functions heretofore performed by individual originating registers and communicates with office pretranslators for effecting digit... | 10/12/1976 |
| 3974341 | Telecommunication exchange A telephone exchange which includes a register having a number of sections in each of which information about a call may be registered; a signal interface unit corresponding to each register section; a time-shared highway; a logic network connected both t... | 08/10/1976 |
