District Court, S.D. Texas May 29, 1941, No. 792 (Schlumberger Well Surveying Corp. v. Halliburton Oil Well Cementing Co.)

KENNERLY, District Judge.

This is a Patent suit.

From a time whence the “memory of man runneth not to the contrary,” humankind have pried into and endeavored to learn the secrets, and harness and utilize the energies, currents, potentials, etc. (by whatever name they may be known, but for brevity here called “earth currents”), of the earth, both on and below the surface.