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Patents for Walter H. Hart
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
1,438,234	Dec. 12, 1922	D. Gould, W.H. Hart	Joint for Zig-Zag Folding Rules	folding rule joints
1,438,235	Dec. 12, 1922	D. Gould, W.H. Hart	Joint for Zig-Zag Folding Rules	folding rule joints
1,438,236	Dec. 12, 1922	D. Gould, W.H. Hart	Joint for Zig-Zag Folding Rules	folding rule joints

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