Bernhardt & Frederick Co., Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4565213 Ball valve device with hold-open tubeExpiredSep 29, 82Jan 21, 86[F16K]
4377179 Pressure balanced ball valve deviceExpiredOct 28, 80Mar 22, 83[F16K]
4262693 Kelly valveExpiredJul 02, 79Apr 21, 81[E21B]

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