Patents by Inventor Ross E. Robertson

Ross E. Robertson 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: 4070571
    Abstract: Utilization of solid state ballasts enables the lamp suspension system to comprise a pair of end blocks carrying fluorescent lamp holders with the end blocks being secured to a supporting surface or having a relatively lightweight member extending between the end blocks to hold them in the desired spaced relationship. The end blocks may be designed for one or more parallel lamp tubes and may be secured together in side by side relationship with or without spaces. The solid state ballast may be situated remotely from the system or may be contained within the system in part or in whole.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: January 24, 1978
    Assignee: Penguin Marketing Ltd.
    Inventors: Ross E. Robertson, Donald L. Tomie