USD249480SExpiredUtility

PH Testing device

Assignee: J & M INSTR CORPPriority: Aug 2, 1976Filed: Aug 2, 1976Granted: Sep 19, 1978

Est. expiryAug 2, 1996(expired)· nominal 20-yr term from priority

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exact text as granted — not AI-modified

The ornamental design for a pH testing device, as shown.

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