| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 340/870.44 | |||||
      | |||||
| Picture | Number | Date | Patentee | Title | |
| 2,074,396 | Mar. 23, 1937 | W.H. Howe | Impedance Variation Amplifier | ||
| 2,083,759 | Jun. 15, 1937 | J.C. Temple | Mechanism for Sizing | ||