919,701 920,084 Trap, J. J. Donovan Recording instrument W. II. Tratt. .919.459, 919,327 Reducing mechanism. A. A. Day 919.781) ReHector, Schmitt & Antou 919.578 Rela.v, «. II. Hill 920.036 Relay, F. L. Dodgson 919,716 2sDetroitEngine29 Releasing' mechanism, F. Gundorph 919.562 Reversing mechanism.… … 920,093 Smith 920,092 Shears, L. T. Slaughter 919,878 Sheet metal box, M. Kamenstein PUate mention the SCIENTIFIC AMERICAN when writing to advertisers
Patents · Device · Apparatus · Adapted · Machine · Hot water · Scientific American · Square foot · Receiving surface · Square holes · Power house · Sheet metal · Sun spot · Practical treatise · Producer gas
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