Patents for John F. Brennan


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Patents for John F. Brennan
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
126,041	Apr. 23, 1872	J.S. Elliott, J.F. Wood	Method of making stone for grinding wood-pulp
126,042	Apr. 23, 1872	J.S. Elliott, J.F. Wood	Improvement in composition-stone frames for hot-air registers