| Patents for Hisey-Wolf Machine Co. |
Patents 1 -
10
of 14
      |
| Picture | Number | Date | Patentee | Title |
 | 712,537 | Nov. 04, 1902 | C.S. Hisey | Electric grinding device |
 | 752,223 | Feb. 16, 1904 | C.S. Hisey | Variable-speed mechanism |
 | 1,241,659 | Oct. 02, 1917 | E. Ritz, Jr. | Electric portable grinder |
| | 1,259,130 | Mar. 12, 1918 | E. Ritz, Jr. | Internal and External Grinder |
| | 1,259,131 | Mar. 12, 1918 | E. Ritz, Jr. | Grinder |
 | 1,259,132 | Mar. 12, 1918 | E. Ritz, Jr. | Portable electric tool |
 | 1,380,595 | Jun. 07, 1921 | E. Ritz, Jr. | Quick-throw electric switch |
 | 1,525,691 | Feb. 10, 1925 | G.H. Poth | Electric motor |
 | 1,638,459 | Aug. 09, 1927 | E. Ritz | Grinding-wheel guard |
 | 1,938,723 | Dec. 12, 1933 | E. Ritz, Jr. | Grinding machine |
