Number | Name | Date | Kind |
---|---|---|---|
2849232 | Halahan et al. | Aug 1958 | |
3747918 | Margulis et al. | Jul 1973 | |
4169674 | Russel | Oct 1979 | |
4269406 | Hamlin | May 1981 | |
4275877 | Silverberg | Jun 1981 | |
4284270 | Silverberg | Aug 1981 | |
4299381 | Smith | Nov 1981 | |
4336928 | Smith et al. | Jun 1982 | |
4397459 | Silverberg et al. | Aug 1983 | |
4451138 | Anderson | May 1984 | |
4469320 | Wenthe | Sep 1984 | |
4550903 | Moore | Nov 1985 | |
4566683 | Moore | Jan 1986 | |
4589645 | Tracy | May 1986 | |
4597570 | Huggins | Jul 1986 | |
4638986 | Huggins et al. | Jan 1987 |
Number | Date | Country |
---|---|---|
88734 | Apr 1987 | JPX |
202534 | Aug 1988 | JPX |
Entry |
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Wenthe, Stephen, "Stack Weight Sensing Paper Tray", Xerox Disclosure Journal, vol. 7, No. 4, p. 229 (Jul./Aug. 1982). |