Patents by Inventor Derwood Stephen DeLong

Derwood Stephen DeLong 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).

  • Sub-Irrigated Tennis Court
    Publication number: 20200217023
    Abstract: A sub-irrigation system includes a special water distribution assembly that is able to rapidly disperse water underneath a court surface. The system has a water distribution assembly with a water channel and permeable fabric covering. The system also includes an electronic control system to monitor and maintain a desired moisture content of a court. Inevitable variations resulting from manual and gravity fed water control only are moderated or eliminated by the automatic control herein.
    Type: Application
    Filed: August 26, 2019
    Publication date: July 9, 2020
    Applicant: Har-Tru, LLC
    Inventors: Roy Hey, Sandra Humphreys Hunt, Derwood Stephen DeLong
  • Sub-irrigated tennis court
    Patent number: 10704206
    Abstract: A sub-irrigation system includes a special water distribution assembly that is able to rapidly disperse water underneath a court surface. The system has a water distribution assembly with a water channel and permeable fabric covering. The system also includes an electronic control system to monitor and maintain a desired moisture content of a court. Inevitable variations resulting from manual and gravity fed water control only are moderated or eliminated by the automatic control herein.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: July 7, 2020
    Assignee: Har-Tru, LLC
    Inventors: Roy Hey, Sandra Humphreys Hunt, Derwood Stephen DeLong
  • Sub-irrigated tennis court
    Patent number: 10435851
    Abstract: A sub-irrigation system includes a special water distribution assembly that is able to rapidly disperse water underneath a court surface. The system has a water distribution assembly with a water channel and permeable fabric covering. The system also includes an electronic control system to monitor and maintain a desired moisture content of a court. Inevitable variations resulting from manual and gravity fed water control only are moderated or eliminated by the automatic control herein.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: October 8, 2019
    Assignee: Har-Tru, LLC
    Inventors: Roy Hey, Sandra Humphreys Hunt, Derwood Stephen DeLong
  • Sub-Irrigated Tennis Court
    Publication number: 20190218727
    Abstract: A sub-irrigation system includes a special water distribution assembly that is able to rapidly disperse water underneath a court surface. The system has a water distribution assembly with a water channel and permeable fabric covering. The system also includes an electronic control system to monitor and maintain a desired moisture content of a court. Inevitable variations resulting from manual and gravity fed water control only are moderated or eliminated by the automatic control herein.
    Type: Application
    Filed: January 4, 2019
    Publication date: July 18, 2019
    Applicant: Har-Tru, LLC
    Inventors: Roy Hey, Sandra Humphreys Hunt, Derwood Stephen DeLong