| All Patents in class 451/333 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 773,929 | Nov. 01, 1904 | B. Danhof | Dowel-pin machine | dowel making machines |
| 1,548,563 | Aug. 04, 1925 | H.K. Spencer | Means For Handling Articles | grinding attachments |
| 1,628,618 | May 10, 1927 | H.K. Spencer | Means For Handling Articles | grinding attachments |
| 1,779,823 | Oct. 28, 1930 | C.H. Norton | Automatic Cylindrical grinding machine | cylindrical grinders |
| 1,783,121 | Nov. 25, 1930 | J.H. Hoern | Piston Ring Burr Removing Device | surface grinders |
| 1,814,351 | Jul. 14, 1931 | F.J. Theler | Grinding Machinery | grinding machines |
| 1,850,372 | Mar. 22, 1932 | G.W. Binns | Grinding Machine | grinding machines |
| 3,309,821 | Mar. 21, 1967 | R. Grzymek, P.J. Gruber | Automatic Work Loading Mechanism for Machine Tools | workpiece changers and storage mechanisms |
