Patents by Inventor Martin Jeffrey Welch

Martin Jeffrey Welch 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).

  • Solar supplemental heating system
    Patent number: 4083490
    Abstract: A compact and economical supplemental home heating system utilizes a colloidal suspension of finely divided graphite particles as the collection medium. The emitter of the system is closely spaced from the collector so as to reduce complexity and cost of the system itself, as well as to facilitate inexpensive installation into existing dwellings.
    Type: Grant
    Filed: February 26, 1976
    Date of Patent: April 11, 1978
    Inventors: John Joseph Cunningham, Martin Jeffrey Welch, Henry Francis Puppolo