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| All Patents in class 340/870.18 | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 2,477,085 | Jul. 26, 1949 | F. Rieber | Frequency Controlled Micrometer | |
| 3,258,667 | Jun. 28, 1966 | J.O. McDonough, J. Steranka, Jr. | Phase Shift Decoder for a Servo Control | ||
![]() | 5,517,190 | May 14, 1996 | C.N. Gunn | Physical Measurement from changes in Reactance | |