ROTRON INCORPORATED

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6453504 Power driven wiper system for outside vehicle mirrorsExpiredAug 11, 00Sep 24, 02[B60S]
5656494 Biofilter with modular traysExpiredJun 07, 95Aug 12, 97[C12M]
5117167 Commutating energy suppression circuit for an electronically commutated DC motorExpiredNov 01, 90May 26, 92[H02P]
4845411 Brushless DC motor and encoding techniqueExpiredSep 30, 87Jul 04, 89[H02K]
4656553 Electronically programmable universal brushless DC fan with integral tracking and locked rotor protectionExpiredJan 21, 86Apr 07, 87[H02H]
4542768 Pressure relief valveExpiredMar 12, 84Sep 24, 85[F16K]
4484114 Self-starting brushless DC motorExpiredMar 04, 82Nov 20, 84[H02P]

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