|
| US4475650 | 8 Jul 1983 | 9 Oct 1984 | | Case for draftsman |
| US4513511 | 12 Ago 1982 | 30 Abr 1985 | Esselte Pendaflex Corporation | Layout boards |
| US4848243 | 12 Ene 1988 | 18 Jul 1989 | | Drawing table construction |
| US5219073 | 31 Mar 1992 | 15 Jun 1993 | Johnson Level & Tool Mfg. Co., Inc. | Prepackaged kit of tools |
| US5305538 | 13 Sep 1991 | 26 Abr 1994 | Contemporary Inc. | Plastic plate with graphics |
| US5398435 | 13 Oct 1993 | 21 Mar 1995 | | Plastic plate with graphics |
| US5398810 | 1 Feb 1994 | 21 Mar 1995 | | Tool box with compartment cover boards |
| US5447243 | 21 Nov 1988 | 5 Sep 1995 | | Drawing tool holder & organizer |
| US5732925 | 9 May 1995 | 31 Mar 1998 | | Clipboard with art supply container |
| USD250973 | 2 Jul 1975 | 30 Ene 1979 | | Combined drawing board and instrument carrying case |
| USD319074 | 27 Sep 1988 | 13 Ago 1991 | | School supply carrier |
| USD366501 | 10 Feb 1995 | 23 Ene 1996 | | Clipboard |
