1995-03-28
1996-05-07
Seifert, Ralf
Patent
active
D03694640
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patent: D300582 (1989-04-01), Hodge
patent: D308757 (1990-06-01), Sanford
patent: D324954 (1992-03-01), Lewis
patent: 2571609 (1951-10-01), Powell
patent: 4739877 (1988-04-01), Olson
patent: 5454567 (1995-10-01), Adell
Conroy William
Williams Darrell R.
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