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| Patents for David D. Walker | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,313,187 | Apr. 11, 1967 | M.L. Benjamin, D.D. Walker | Boring bar insert | boring bars | |
| 3,364,799 | Jan. 23, 1968 | W.N. Miles, D.D. Walker, M.L. Benjamin | Offset Boring Head | boring heads | |
| 3,941,014 | Mar. 02, 1976 | D.D. Walker, M.L. Benjamin | Precision Heavy Duty Indexer | indexers and dividers | |
| 4,080,849 | Mar. 28, 1978 | W.N. Miles, D.D. Walker, M.L. Benjamin | Precision Heavy Duty Indexer | indexers and dividers | |