USD253115SExpiredUtility

Metric converter slide rule

29
Assignee: HASBRO INDUSTRIES INCPriority: Dec 5, 1977Filed: Dec 5, 1977Granted: Oct 9, 1979
Est. expiryDec 5, 1997(expired)· nominal 20-yr term from priority
Inventors:William Hackemann
29
PatentIndex Score
2
Cited by
2
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a metric converter slide rule, substantially as shown and described.

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