Patents by Inventor Richard Andrejkovies

Richard Andrejkovies has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System for sympathetic detonation of explosives
    Patent number: 6247408
    Abstract: A system is disclosed that remotely activates one or more explosive charge by sympathetic detonation (i.e., not requiring explosives to be interconnected by wire). The system includes electronics that control the activation of each explosive charge and which are responsive to an acoustic sensor, a seismic sensor and a hydrophone sensor. In one embodiment an RF transmitter, which prior to detonation of an explosive charge, sends a wake-up signal to another system for a sequentially controlled sympathetic detonation of one or more explosive charges.
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: June 19, 2001
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard Andrejkovies, Frank Nappi, James Chopack, Carl Campagnuolo