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| Patents Granted on 1971-03-23 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,571,912 | Mar. 23, 1971 | E.J. Kielma | Multi-tool Tool Changer | tool changers and storage mechanisms | |
| 3,572,195 | Mar. 23, 1971 | E.F. Gourley | Quick-change toolpost | lathe tool holders and tool posts | |
| 3,572,197 | Mar. 23, 1971 | R.M. Ortlieb | Adjustable Toolholder | drilling and boring tool holders | |
| 3,572,396 | Mar. 23, 1971 | H.R. Hoffman, H.L. Sidenstick | Rubber band stack and method and apparatus for its manufacture | packing and packaging machines | |