Patents by Inventor Carpenter Robert Leonard

Carpenter Robert Leonard 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).

  • Hands-free megaphone
    Publication number: 20020176586
    Abstract: The megaphone includes a headset 1 incorporating a microphone 5 which is connected via a flexible cable 8 to a body pack 2. The body pack includes a housing 9 which incorporates a battery compartment, an amplifier, a siren and an on/off switch. The housing 9 is mounted on a belt 3 together with an audio output horn 12.
    Type: Application
    Filed: May 22, 2001
    Publication date: November 28, 2002
    Inventor: Carpenter Robert Leonard