Number | Name | Date | Kind |
---|---|---|---|
3049247 | Lemelson | Aug 1962 | |
3402836 | Debrey et al. | Sep 1968 | |
3480162 | Saul | Nov 1969 | |
3497088 | Lemelson | Feb 1970 | |
3719287 | Billingsley et al. | Mar 1973 | |
3734311 | Thompson et al. | May 1973 | |
3958102 | Burt | May 1976 | |
4007843 | Lubbers et al. | Feb 1977 | |
4074120 | Allred et al. | Feb 1978 | |
4120629 | Christian | Oct 1978 |
Entry |
---|
"Six Hundred Products . . . ", Mehanical Handling, London, England, Nov. 1970, p. 49. |
"A Victory Over Variety", Modern Materials Handling, USA, vol. 27, No. 11, Nov. 1972, p. 64. |