TREA

David B. Smith

Follow

Person

  • Calgary, Alberta, CA
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Pet door
    • Patent number 5,117,890
    • Issue date Jun 2, 1992
    • Robert Taylor
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Rotary internal combustion engine with oscillating pistons
    • Patent number 4,024,841
    • Issue date May 24, 1977
    • David B. Smith
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS