| All Patents in class 33/538 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 1,169,900 | Feb. 01, 1916 | W. Winter | Sine-Bar | angle bars and angle plates |
| 1,169,928 | Feb. 01, 1916 | W.C. Commons | Movable Sine-Bar | angle bars and angle plates |
| 2,351,773 | Jun. 20, 1944 | H.J. Lovenston | Device for Determining Angles | grinding attachments |
| 2,365,436 | Dec. 19, 1944 | L.H. Saucier | Adjustable Angle Plate | angle bars and angle plates |
| 2,366,385 | Jan. 02, 1945 | H.B. Comfort | Angle Plate | angle bars and angle plates |
| 2,565,924 | Aug. 28, 1951 | A.H. Kraft | Machine-Tool Angle Bar | protractors |
| 2,889,757 | Jun. 09, 1959 | D.J. Cole | Machine tool vise | metalworking machine vises |
| 3,061,935 | Nov. 06, 1962 | J.T. De Witt | Instrument for Determining Angles | grinding attachments |
| 3,432,934 | Mar. 18, 1969 | H. Schmidt | Sine plate assembly | angle bars and angle plates |
