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| All Patents in class 307/115 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,671,861 | Mar. 09, 1954 | E.P. Bullard, III | Material-Handling Apparatus and Control Therefor | conveyors and hoppers | |
| 3,045,130 | Jul. 17, 1962 | W. Raap, N.P. Bashor | Heavy Duty Electrical Switching Apparatus | electric switches | |
| 3,089,989 | May 14, 1963 | J.A. Rave, Jr. | Positioning Device Including Means for Dividing Intervals into Preselected Numbers of Equal Parts | indexers and dividers | |
| 3,273,023 | Sep. 13, 1966 | H.F. Meyer | Selector circuit | ||