U.S. patent number D453,042 [Application Number D/135,788] was granted by the patent office on 2002-01-22 for coupling ring for ventilation ducts. This patent grant is currently assigned to Lindab AB. Invention is credited to Sten Hogman, Kenneth Lennartsson, Lars-.ANG.ke Mattsson, Carl-Gustaf Sonden.
United States Patent | D453,042 |
Mattsson , et al. | January 22, 2002 |
Inventors: | Mattsson; Lars-.ANG.ke (B.ang.stad, SE), Lennartsson; Kenneth (Torekov, SE), Hogman; Sten (Grevie, SE), Sonden; Carl-Gustaf (Angelholm, SE) |
---|---|
Assignee: | Lindab AB (Bastad,
SE) |
Appl. No.: | D/135,788 |
Filed: | January 17, 2001 |
Current U.S. Class: | D23/393 |
Current International Class: | 2304 |
Field of Search: | ;D23/393 ;29/890.15 ;72/82-84,86 ;285/363 |
D231356 | April 1974 | Kurr |
5129690 | July 1992 | Meinig et al. |
5983496 | November 1999 | Hermanson |
2 311 031 | Jun 1998 | GB | |||
AccuFlange: Round & Oval Duct Connection System, Accu Duct Mfg., product brochure, 1998, pp. 1-32. . LindabRekt, Instruction manual, Lindab Nord AB, May 20, 1998, pp. 1-4. . Rektangulara kanalsystem, Lindab Rekt, product brochure 2000, pp. 1-8. . Introduction to the Rectangular Duct Construction Schedules, HVAC Duct Construction Standards Metal and Flexible--2.sup.nd ed., SMAGNA Section 1.8 ff., pp. 1.12-1.43.. |
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