| Number | Name | Date | Kind |
|---|---|---|---|
| 253514 | Cooke | Feb 1882 | |
| 1015498 | Kraus | Jan 1912 | |
| 1512827 | Deutsch | Oct 1924 | |
| 1958579 | Johnson et al. | May 1934 | |
| 2116989 | Unger et al. | May 1938 | |
| 2161587 | Pettis | Jun 1939 | |
| 2167296 | Farmer | Jul 1939 | |
| 2359195 | Berliner et al. | Sep 1944 | |
| 2726460 | Jecmen | Dec 1955 | |
| 2917837 | Hoeltje | Dec 1959 | |
| 3163943 | Bell | Jan 1965 | |
| 3774418 | Cooper | Nov 1973 | |
| 3838520 | Quenot | Oct 1974 | |
| 4143472 | Murata et al. | Mar 1979 | |
| 4427391 | Berman | Jan 1984 | |
| 4834334 | Robins | May 1989 | |
| 4896927 | Liu et al. | Jan 1990 | |
| 4960383 | Smith et al. | Oct 1990 | |
| 4968258 | Kees | Nov 1990 | |
| 5163845 | Blassingame | Nov 1992 | |
| 5213504 | Lee et al. | May 1993 | |
| 5284445 | Dietterich et al. | Feb 1994 | |
| 5324202 | Meyers et al. | Jun 1994 | |
| 5409383 | Mannino | Apr 1995 | |
| 5785528 | Jones-Fenleigh et al. | Jul 1998 | |
| 5938449 | Masson et al. | Aug 1999 |
| Number | Date | Country |
|---|---|---|
| 0 730 983 A1 | Sep 1996 | EPX |
| 19651 | Oct 1882 | DEX |
| Entry |
|---|
| Tyco advertisement, Creative Art Center. |
| International Search Report (PCT/US00/02694), European Patent Office, mailed Jun. 29, 2000. |