General Electric Co. v. Yablonsky

CLARK, District Judge.

The usual issue of anticipation by prior patents. The 'art, if it may be called an art, is the placing (positioning in the jargon of patent solicitors and their specifications) of electric light filaments for effective highway reflection.

The pertinent principle of physics is conceded:

“Conversely, when a wave originates at the focus of a parabolic piirror it is reflected as a rigorously plane wave, that is, as a parallel beam. Hence the use of parabolic mirrors in search lights.” (Electricity, Sound, and Light, by Millikan and Mills, p. 287.)

It is further agreed that such…