UNT Libraries Government Documents Department - 2 Matching Results
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- Improvement in Insect-Destroyers.
- Patent for a device to destroy "winged insects which are destructive to the cotton plants and other vegetation" (lines 19-21) including instructions and illustrations.
- Spring-Washer for Piano-Flanges.
- Patent for a spring washer for piano flanges that prevents the flanges from becoming loose over time.