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| US4136907 | 24 Feb 1977 | 30 Ene 1979 | | Barberchair | | US4955666 | 19 May 1989 | 11 Sep 1990 | M-D, Inc. | Surgical chair or table with debris-catching facility and disposable catch bag therefor | | US5660432 | 8 Feb 1996 | 26 Ago 1997 | | High chair catch attachment | | US7891731 | 18 Jul 2008 | 22 Feb 2011 | | Debris collection systems, devices and methods for attachment to chairs |
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