Patents by Inventor Frederick Alexander

Frederick Alexander 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).

  • Patent number: 9886837
    Abstract: A wireless personal alarm system designed to prevent a person from inadvertently losing or forgetting valuable personal articles such as cellphone, wallet, or keys. The system includes tags which are affixed to a valuable personal article, and includes facets which each correspond to a different tag. When the tag and its corresponding facet are too far apart, the system activates an alert to the user, thereby alerting the user to not forget the article affixed to the tag.
    Type: Grant
    Filed: October 1, 2016
    Date of Patent: February 6, 2018
    Inventor: Frederick Alexander
  • Patent number: 4733824
    Abstract: For overcoming certain inherent disadvantages associated with most agricultural fertilizer distributors, a hopper having a distributor under its floor has a clean out door that is adapted to be closed using a tensioned flexible cover. The flexible cover is drawn into sealing abutment with the edges of the hopper housing walls by tensioning members. Advantages of this difference in construction include, for example, the ease with which blockages can be cleared from the distributor mechanism without the necessity of first emptying the contents of the hopper. The flexible cover is made of non-corrosive material and is not easily damaged by rough handling.
    Type: Grant
    Filed: July 31, 1986
    Date of Patent: March 29, 1988
    Inventor: Frederick Alexander