| All Patents in class 279/56 |
Patents 76 -
86
of 86
      |
| Number | Date | Patentee | Title | Type |
| 1,824,623 | Sep. 22, 1931 | P.L. Robertson | Tool Holder | tool holders |
| 1,850,938 | Mar. 22, 1932 | L. Skeel, F.P. Miller | Tapping or Tool Holder | drilling and boring tool holders |
| 1,854,825 | Apr. 19, 1932 | E.L. Connell | Method of making alpha collet | |
| 1,857,012 | May 03, 1932 | M.H. Corley | Tap holder | tapping heads and chucks |
| 1,864,466 | Jun. 21, 1932 | J.M. Peterson | Tool Holder | tool holders |
| 1,880,521 | Oct. 04, 1932 | A.L. Stowell | Bit or drill holder | |
| 1,883,713 | Oct. 18, 1932 | C.B. Gray | Tool Holder | metalworking machine tool holders |
| 1,953,637 | Apr. 03, 1934 | A.L. Stowell, H.L. Smith | Chuck | |
| 2,424,524 | Jul. 22, 1947 | W.H. Weimer | Boring machine | boring and turning machines |
| 2,893,743 | Jul. 07, 1959 | E.J. Ondeck | Chuck with Ball Locking Means | drill press chucks |
| 2,910,302 | Oct. 27, 1959 | E.J. Ondeck | Cam Chuck | drill press chucks |
