UNT Libraries Government Documents Department - 3 Matching Results
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- Fly-Trap.
- Patent for an improvement to fly traps in which the flies are attracted by a sweet smelling substance down a funnel into the substance from which they are unable to escape. The flies either drown in the substance or are poisoned.
- Pipe Gripping Device.
- Patent for Pipe Gripping Device used in conjunction with a good drilling outfit to grip and support the casing pipe of a well.
- Pump-Plunger
- Patent for a pump-plunger.