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|United States Patent||D383,195|
|Sonden , et al.||September 2, 1997|
|Inventors:||Sonden; Carl-Gustaf (Angelholm, SE), Lennartsson; Kenneth (Torekov, SE)|
|[*] Notice:||The portion of the term of this patent subsequent to July 4, 2009 has been disclaimed.|
|Filed:||April 9, 1993|
|Mar 01, 1993 [DK]||0226 93|
|Current U.S. Class:||D23/262|
|Current International Class:||0808|
|Field of Search:||D23/262,263,264,265 285/424 138/109 277/27A 16/2,108,109|
|210367||November 1878||Stern et al.|
|2392220||January 1946||Bruhn et al.|
|2823703||February 1958||Nusser, Jr.|
|3290066||December 1966||Primich et al.|
|4050703||September 1977||Tuvesson et al.|
Pipes by Solpast AB disclosed in a catalogue entitled "Svensk Byggkatalog Arp-87", issued by Svensk Byggtajanst in 1987. .
Product NPU disclosed in a catalogue entitled "Ventilation -88", issued by Lindab AB in 1988. .
Product ESIU disclosed in a catalogue entitled "Ventilation -88", issued by Lindab AB in 1988. .
Product IK disclosed in a catalogue entitled "Ventiltion -88", issued by Lindab AB in 1988. .
General drawings No. J299102, produced by the Swedish company Flakt and dated Nov. 19, 1981 (811119). .
Catalogue entitled "Kanalsystem VELODUCT", issued by Flatk in 1982. .
CurveCutting Machine Delta 2 issued by Emil Suter Maschinenfabrik AG, CH-5703 Seon/Schweiz (English translation). .
Product Catalog entitled "Ducts and Fittings," issued by Lindab AB, Caswell Road, Brackmills Industrial Estate, Northampton NN4 OBR, England, 52 pp., first distributed in 1987. .
Product Catalog entiled "Circular Duct System," issued by Lindab AB, 45 Caswell Road, Brackmills Business Park, Northampton NN4 OPW, England, 42 pp. Mar. 1992. .
Swedish-language Product Catalog entitled "VELODUCT Cirkulart kanalsystem," issued by Flakt VELODUCT AB, Prastg.ang.rdsvagen 15, Box 84, 153 00 Jarna, Sweden, 29 pp., Jun. 1991. .
Product literature entitled "SPIRO Bend Segment Cutting Machine I" issued by Spiro Investment AG, Industriestrasse, CH-3178 Boesingen, Switzerland, 2 pp., first distributed c. 1978. .
Product literature entitled "SPIRO Bend Segment Cutting Machine II" issued by SPIRO Investment AG, Industriestrasse, CH-3178 Boesingen, Switzerland, 6 pp., first disributed c. 1980. .
German-language Product literature entitled "Kurven-schneidemaschine delta 2," issued by SUTER AG SEON, 5703 Seon/Schweiz, Switzerland, 6 pp., first distributed c. 1982. .
Product literature entitled "Seam Forming and Locking Machine beta 2," issued by SUTER AG SEON, 5703 Seon/Schweiz, Switzerland, 4 pp., first distributed c. 1982..