| All Patents in class 359/442 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 540,184 | May 28, 1895 | T. Norris | Markre for Slide Rules |
 | 901,879 | Oct. 20, 1908 | L. Chronik, A. Chronik | Thread Counting Apparatus |
 | 970,795 | Sep. 20, 1910 | L. Chronik, A. Chronik | Thread Counting Apparatus |
| | 1,179,142 | Apr. 11, 1916 | B.F. Shaughnessy | Gaging Instrument |
 | 1,740,970 | Dec. 24, 1929 | L. Chronik, A. Chronik | Thread Counting Apparatus |
| | 2,006,370 | Jul. 02, 1935 | L.J. Schumacker, E.A. Reussenzehn | Scale head |
| | 3,516,306 | Jun. 23, 1970 | J. Müller | Boring Head for Machine Tools |
