UNT Libraries Government Documents Department - 3 Matching Results
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- Rolling Cattle-Guard.
- Patent for a serrated device that prevents cattle from escaping.
- Pneumatic Conveyer
- Patent for pneumatic conveyor to handle cotton seeds that are being discharged. This particular conveyor uses air currents to operate it.
- Motion-Picture-Film Cleaner.
- Patent for improvement in motion picture film cleaners which quickly and efficiently removes oil, dirt and grease from film that has been caused by the machines; includes illustrations.