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| Patents for Harry V. Holman | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,403,958 | Jan. 17, 1922 | H.V. Holman | Hand-Screw Clamp | hand screws | |
| 1,783,713 | Dec. 02, 1930 | H.V. Holman | Adjustable clamp | bar and pipe clamps | |
| 2,221,325 | Nov. 12, 1940 | H.V. Holman | Adjustable clamping device | bar and pipe clamps | |
| 2,815,778 | Dec. 10, 1957 | H.V. Holman | Straight beam adjustable jaw clamp | bar and pipe clamps | |