USD315424SExpiredUtility

Vertical barrier fresnel lens array for infrared motion detector systems

Assignee: FRESNEL TECH INCPriority: Feb 27, 1989Filed: Feb 27, 1989Granted: Mar 12, 1991

Est. expiryFeb 27, 2009(expired)· nominal 20-yr term from priority

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exact text as granted — not AI-modified

The ornamental design for a vertical barrier fresnel lens array for infrared motion detector systems, as shown and described.

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