| All Patents in class 29/219 |
Patents 1 -
15
of 27
      |
| Number | Date | Patentee | Title | Type |
| 852,145 | Apr. 30, 1907 | E. Stevens | Valve Jack | valve spring tools |
| 852,846 | May 07, 1907 | J. Rabey | Device For Facilitating The Removal Of Valves | valve spring tools |
| 854,860 | May 28, 1907 | C.F. Weeber | Tool For Removing Engine Valves | valve spring tools |
| 868,952 | Oct. 22, 1907 | H.Z. White | Valve Remover | valve spring tools |
| 944,149 | Dec. 21, 1909 | P. Peterson | Valve Spring Lifter | valve spring tools |
| 1,006,185 | Oct. 17, 1911 | C. Dillhoff | Valve Releasing Tool | valve spring tools |
| 1,018,236 | Feb. 20, 1912 | J.J. Cooper | Implement For Automobile Engines | valve spring tools |
| 1,034,874 | Aug. 06, 1912 | G.F. Clark | Device For Removing Valve Springs | valve spring tools |
| 1,046,638 | Dec. 10, 1912 | A. Petersen | Valve Spring Compressor | valve spring tools |
| 1,064,640 | Jun. 10, 1913 | W.M. Hallbauer | Valve Spring Lifter | valve spring tools |
| 1,208,406 | Dec. 12, 1916 | C.O. Throp | Valve Remover | valve spring tools |
| 1,241,488 | Oct. 02, 1917 | E.L. Beardsley | Lifter | valve spring tools |
| 1,243,010 | Oct. 16, 1917 | W.S. Thomson | Perfect Handle Valve Lifter | valve spring tools |
| 1,266,285 | May 14, 1918 | A.B. Lockhart | Valve Spring Compressor | |
| 1,296,784 | Mar. 11, 1919 | E.E. Essen | Valve Lifter | valve spring tools |
