USD268413SExpiredUtility

Double diaphragm pump

86
Individually held — no corporate assignee on recordPriority: Dec 9, 1980Filed: Dec 9, 1980Granted: Mar 29, 1983
Est. expiryDec 9, 2000(expired)· nominal 20-yr term from priority
Inventors:James K. Wilden
86
PatentIndex Score
23
Cited by
3
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a double diaphragm pump, substantially as shown and described.

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