Drilldown: Patents

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Patents > Filing date: 1985 & Grant date: 1980 - 1989

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Inventors:
Heinz Erwin Grellmann (6) · Bruce J. Penney (5) · Keith E. Jones (4) · Leonard A. Roland (4) · Carl W. Laakso (3) · David D. Chapman (3) · Gerd H. Hoeren (3)
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