L. HAND, Circuit Judge.
The patent in suit is for a portable "grease gun" to drive grease, more or less viscous, through the bearings of an automobile or other similar machine. There had been other such before, but the invented improvements were designed to set up much higher pressures. The "gun" is made up of two parts, a cylinder with a reciprocating plunger, and a receptacle for holding the grease, mounted upon the cylinder at right angles, detachably, so that...
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