Patents Assigned to H. C. Knapp Sound Technology Inc.
  • Solar powered hearing aid
    Patent number: 5253300
    Abstract: Hearing aids include rechargeable batteries and contacts accessible from outside of the hearing aid casing for the battery. A charging case includes solar cells mounted on the charging case for outputting energy for charging the batteries in the hearing aids. The charging case may include silos for supporting an over-the-ear hearing aid or a recess for receiving a volume control on the hearing aid.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: October 12, 1993
    Assignee: H. C. Knapp Sound Technology Inc.
    Inventor: Herbert C. Knapp