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Air brake patents. Vol. 3.

Format: Print Book 1924
Availability:
Other: ... patent no. 241,156, dated May 10, 1881 / David S. Randolph -- Air-brake apparatus : specification forming ...

Air brake patents. Vol. 2.

Format: Print Book 1924
Availability:
Other: ... / Philip V. Conover -- Improvement in hose-pipe couplings : specification forming part of letters patent no ...