Patents by Inventor Robert Trowbridge

Robert Trowbridge 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).

  • Publication number: 20110109260
    Abstract: Sun sent power systems comprises a solar battery recharging assembly for children's electric toy vehicles (such as electric scooters, electric riding power vehicles and other such electrically powered outdoor riding toys). The solar battery recharging assembly comprises an array of photovoltaic panels having a plurality of solar cells to convert sun light into DC power to operate the toy vehicle. Sun sent power systems may be used to power and recharge virtually any outdoor electric toy substantially eliminating the need for users to have to plug the toys into standard electric outlets. The solar powering means of the photovoltaic panels enable the power toys to be continuously recharged while in use, thereby extending the duration of playtime and battery life. The item may be OEM installed or may be comprise an add-on converter kit for removable installment to an existing toy vehicle.
    Type: Application
    Filed: November 9, 2010
    Publication date: May 12, 2011
    Inventor: Robert Trowbridge
  • Patent number: 5451240
    Abstract: A process for the preparation of compositions for stimulating plant growth whereby coal ash is fused with a humic acid-bearing ore, and more particularly fusing fly ash with leonardite ore; compositions produced by such a process; and methods for use thereof for stimulating plant growth.
    Type: Grant
    Filed: November 19, 1991
    Date of Patent: September 19, 1995
    Inventor: Robert Trowbridge