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| All Patents in class 254/6B | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 998,211 | Jul. 18, 1911 | A.O. Slentz | Lifting-jack | |
 | 1,621,314 | Mar. 15, 1927 | I.E. Dearsley | Lifting jack | |
 | 1,818,077 | Aug. 11, 1931 | R.E. Manley, F.T. Flinchbaugh | Mechanical jack | |
 | 1,883,157 | Oct. 18, 1932 | G.E. Weaver, A.J. Vettel | Jack | |
| 2,018,148 | Oct. 22, 1935 | E.M. Pfauser | Safety Control for Mechanical Garage Jacks | ||