Patents by Inventor Willard E. Trefren

Willard E. Trefren 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).

  • DOORBELL IMPROVEMENTS
    Publication number: 20220044529
    Abstract: A notification system utilizing a doorbell assembly in electrical communication with a sound generating mechanism (e.g., a windchime) is described to produce sound(s). In some embodiments, the system utilizes a modification of existing elements to produce the notification system. In some embodiments, the system utilizes assembled parts as part of a notification system or assembly.
    Type: Application
    Filed: August 4, 2020
    Publication date: February 10, 2022
    Inventor: Willard E. Trefren