Number | Name | Date | Kind |
---|---|---|---|
3757899 | Smith, Jr. | Sep 1973 | |
4222461 | Gunti | Sep 1980 | |
4252217 | Benjamin | Feb 1981 | |
4830146 | Nakamura et al. | May 1989 | |
5056627 | Pelto-Huikko | Oct 1991 |
Entry |
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"Vertical Material Handling", Pflow Industries, Inc., Milwaukee, Wis. |
"Nothing Lifts Like A Langley", Mfg. Div. of M. D. Knowlton Co. Victor NY. |