Patents by Inventor Bjorn Heyning

Bjorn Heyning 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).

  • Patent number: 4110750
    Abstract: A programmable electronic door chime is disclosed. The door chime includes programming means to select any desired sequence of notes up to a given maximum which are sounded after momentarily closing a normally open push-button switch. The note sequence is truncated when a different normally open push-button switch is momentarily closed so that the particular switch actuating the chimes may be identified by the length of the note sequence. Tone adjustments are provided to vary the frequency, duration and beat of each note to produce a pleasing sound.
    Type: Grant
    Filed: October 1, 1976
    Date of Patent: August 29, 1978
    Assignee: Heath Company
    Inventors: Bjorn Heyning, Dennis D. Tremblay