Assignee

JOHNSON ROBERT R

US·2 granted patents·45 citations·filing 1983–1988

Technology mixA24D1 F23J1

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2 records

0173US4497308AAsh receptacle with dust eliminatorJOHNSON ROBERT R·Filed 1983·Granted Feb 5, 1985·26 cites·5 claims
0254US5082008ASmoking articleJOHNSON ROBERT R·Filed 1988·Granted Jan 21, 1992·19 cites·8 claims

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