Assignee
DELAWARE INVESTMENTS INC
US·3 granted patents·35 citations·filing 1988–1989
Top patents by PatentIndex Score
3 records- 0151US4940131AMaterial handling system and control valve thereofDELAWARE INVESTMENTS INC·Filed 1989·Granted Jul 10, 1990·16 cites·8 claims
- 0250US4830043AImprovement in rotary valvesDELAWARE INVESTMENTS INC·Filed 1988·Granted May 16, 1989·13 cites·12 claims
- 0334US4869594AApparatus and method for blending particulate materialsDELAWARE INVESTMENTS INC·Filed 1988·Granted Sep 26, 1989·6 cites·36 claims
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