Portable extension ramp
First Claim
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1. The ornamental design for a portable extension ramp, as shown and described.
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Accused Products
24 Citations
1 Claim
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1. The ornamental design for a portable extension ramp, as shown and described.
Specification
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Current AssigneeRobert F. Crump
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Original AssigneeRobert F. Crump
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InventorsCrump, Robert F.
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Primary Examiner(s)Burke, Wallace R.
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Assistant Examiner(s)Chin, Kay H.
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Application NumberUS06/827,727Time in Patent Office1,114 DaysField of SearchD34/28, D34/32, 14/71.1, 14/69.5, 14/71.7, 414/537, 248/346, 254/88, 254/81, 193/41, 193/38US Class CurrentD34/32CPC Class CodesN/A
