| Patents for John D. Hale |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 3,031,021 | Apr. 24, 1962 | J.B. Rolfe, J.D. Hale | Magnetic Balance Indicator | scales and balances |
| 3,103,390 | Sep. 10, 1963 | J.D. Hale | Scale Suspension System | scales and balances |
| 3,181,635 | May 04, 1965 | J.D. Hale | Portable Weighing Scale | scales and balances |
| 3,238,916 | Mar. 08, 1966 | J.D. Hale | Indicator Mechanism for Scales | scales and balances |
| 3,266,583 | Aug. 16, 1966 | J.D. Hale | Scale Indicator Mechanism Controlling Container Weighing and Filling Operations | scales and balances |
| 3,877,532 | Apr. 15, 1975 | J.D. Hale | Low Profile Scale | scales and balances |
| 4,609,062 | Sep. 02, 1986 | H.L. Scott, J.D. Hale | Heavy-Duty Industrial Weighing Scale | scales and balances |
