Filed: January 6, 1978FLEXIBLE METALLIC CONDUITS FOR FLUIDS AND PULVERULENT MATERIALOwned by: TUBESTSerial Number: 73154451
Filed: January 18, 1978METALLIC CONDUITS FOR LINING CHIMNEYS; FLEXIBLE METALLIC CONDUITS AND THEIR COUPLINGSOwned by: TUBESTSerial Number: 73156353