Patents by Inventor Arnold Mark

Arnold Mark 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: 4922433
    Abstract: A water conservation system that connects between a standard irrigation system that is controlled by a clock, and the water control valves of that system in order to limit the flow of water during timed irrigation cycles. When the timed watering cycles are initiated by the standard irrigation system, the water conservation device senses the moisture in the soil and compares it with preset wet and dry moisture limits and scales back each of the watering cycles in proportion to the moisture content of the ground to thereby conserve irrigation water that is applied to a ground area. The device includes a moisture sensor, a central processing unit, and a solid state memory that is connected to the central processing unit and the moisture sensor.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: May 1, 1990
    Inventor: Arnold Mark
  • Patent number: 3983447
    Abstract: A switch, and a dual lamp and switch combination comprising two conductive strips spaced from each other and each having a contact point adjacent an upper end. The conductive strips contacting filament wires of the lamp or electrical conductors of a power line. A handle including a base is pivotably mounted relative to the contact points, and a conductive member operated by the handle, selectively contacts at least one of the contact points. The conductive member is integral with at least a portion of the conductive member and engages a metallic screw-on section of the lamp or electrical conductors of the power line.
    Type: Grant
    Filed: May 23, 1975
    Date of Patent: September 28, 1976
    Inventors: Arnold Mark, Donald J. Berman, Sam Cohen