| All Patents in class 29/217 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 821,149 | May 22, 1906 | G.J. Alphandery | Device For Facilitating the Removal of Valves From Valve Boxes of Internal Combustion Engines | valve spring tools |
| 875,761 | Jan. 07, 1908 | F.R. Wickwire | Clamp For Compressing Springs | valve spring tools |
| 890,725 | Jun. 16, 1908 | B.A. Swenson | Valve Remover | valve spring tools |
| 1,050,746 | Jan. 14, 1913 | B. Morgan | Hand Tool | valve spring tools |
| 1,138,462 | May 04, 1915 | J.J. Eagan | Valve Spring Compressor | valve spring tools |
| 1,214,572 | Feb. 06, 1917 | H.B. Mertz | Valve Spring Lifter | valve spring tools |
| 1,357,097 | Oct. 26, 1920 | J. Kister | Valve Lifter | valve spring tools |
| 1,392,373 | Oct. 04, 1921 | J.E. Wainwright | Valve Lifting Device | valve spring tools |
| 4,267,627 | May 19, 1981 | R. Douglas | Attachment for Valve Spring Depressing Tool | valve spring tools |
