Patents by Inventor Richard A. Rosenkrans

Richard A. Rosenkrans 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).

  • Ignition circuit for explosive devices and the like
    Patent number: 4998047
    Abstract: An ignition circuit for explosives with a monostable multi-vibrator controlling a transistor in circuit with a battery and the primary winding of a switching transformer, with the secondary winding directly connected to spaced electrodes at the explosive.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: March 5, 1991
    Assignee: James E. Meagher
    Inventor: Richard A. Rosenkrans