| All Patents in class 451/353 |
Patents 16 -
30
of 32
      |
| Number | Date | Patentee | Title | Type |
| 2,097,730 | Nov. 02, 1937 | A.W. Mall | Terrazzo grinding apparatus | |
| 2,106,033 | Jan. 18, 1938 | A.W. Mall | Terrazzo grinding apparatus | |
| 2,106,035 | Jan. 18, 1938 | A.W. Mall | Terrazzo grinding angle spindle | |
| 2,114,966 | Apr. 19, 1938 | H.L. Myers | Surfacing machine | sanding machines |
| 2,142,697 | Jan. 03, 1939 | H.L. Myers | Rotary surfacing machine | |
| RE21,180 | Aug. 22, 1939 | H.L. Myers | Rotary disk edging machine | sanding machines |
| 2,201,420 | May 21, 1940 | H.M. Zschau | Disc sander for floors | handheld power sanders |
| 2,251,442 | Aug. 05, 1941 | A.N. Emmons | Portable disk abrading machine | sanding machines |
| 2,290,215 | Jul. 21, 1942 | S.L. Stenberg | Tool Holder for Machine Tools | metalworking machine tool holders |
| 2,301,164 | Nov. 03, 1942 | A.W. Mall | Floor grinder | |
| 2,440,440 | Apr. 27, 1948 | O.E. Hadwiger | Edge sanding machine | sanding machines |
| 2,565,658 | Aug. 28, 1951 | W.P. Hilger | Floor sanding edger | floor sanders |
| 2,624,896 | Jan. 13, 1953 | K.C. Atkin | Rug scrubbing machine | |
| 2,626,412 | Jan. 27, 1953 | W.L. Petersen | Rug scrubbing machine | |
| 2,640,211 | Jun. 02, 1953 | W.L. Petersen | Rug scrubbing machine | |
