GEM PENCIL SHARPENER. GEM PENCIL SHARPENER. AN IMPROVED TROUSERS STRAP. CARTER'S IMPROVED TROUSERS STRAP. Floating Industrial Exhibitions. Half a Century of Inventions. A COUPON TICKET STAMP AND PUNCH. DUNAWAY'S COUPON TICKET STAMP AND PUNCH. IMPROVED INKING DEVICE FOR TYPE WRITERS. RAY'S INKING RIBBON SPOOL FOR TYPE WRITERS. AN IMPROVED FOLDING STEP FOR VEHICLES. MARSH'S VEHICLE STEP. WI I, scientific american, 1889-05-11
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