Number | Name | Date | Kind |
---|---|---|---|
3011558 | Conrad | Dec 1961 | |
3306363 | McZilkey et al. | Feb 1967 | |
3448806 | Berryman et al. | Jun 1969 | |
4044826 | Crowe | Aug 1977 | |
4151876 | Briggs et al. | May 1979 |
Entry |
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Baker Oil Tool Catalog 1978-1979, p. 810, Product No. 487-20. |