UNT Libraries Government Documents Department - 2 Matching Results
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- Bit Cleaner
- Patent for a device that will clean drill bits used for wells without needing to remove them from the ground. Additional aspects of the patent cover fittings and attachments necessary for better operation of the drill bits and the cleaner.
- Stirrup
- Patent for "new and useful improvements in stirrups" (lines 5-6), including illustration and instructions.