Number | Name | Date | Kind |
---|---|---|---|
2657533 | Schanzlin et al. | Nov 1953 | |
3230699 | Hann et al. | Jan 1966 | |
3351107 | Hamilton | Nov 1967 | |
3701442 | Dunning et al. | Oct 1972 | |
3708077 | Richens et al. | Jan 1973 | |
3871714 | Behrend | Mar 1975 |
Entry |
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"Bush Log Handling Boom," by Bush Mfg. Co., pp. 44, 45 of Forest Industries, Mar. 1973. |