Portable drum sound simulator
Patent 4909117 Issued on March 20, 1990. Estimated Expiration Date: 
March 31, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 31, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2655071 3053949 3198872 3509264 3634595 3731022 Portable electronic musical instrument Automatic performing apparatus Electronic percussion synthesizer Portable electronic drum set InventorsAssigneeApplicationNo. 333879 filed on 03/31/1989US Classes:84/738, Envelope shaping (e.g., attack, decay, sustain, or release, etc.)84/422.4DrumsticksExaminersPrimary: Witkowski, Stanley J.Attorney, Agent or FirmForeign Patent References
International ClassesG10H 001/057G10H 005/00 AbstractA portable drum sound simulator, especially suitable for carrying by the user, includes a pair of drumsticks containing electrical switches which are actuated by change in motion. The switches are connected to a trigger circuit which initiates operation of a drum sound generator every time a switch is closed. The drum sound signal after amplification drives a loudspeaker. The circuits and loudspeaker are all contained in a small portable case. In an alternative embodiment, a radio receiver is included, whereby the simulator is selectively used as an independent radio, an independent drum sound simulator, or combining the radio signal with the operator produced drum signals.Other References
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