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Helisieve Trademarks
HELISIEVE
wastewater treatment apparatus; namely, an open-channel municipal and industrial wastewater prescreening sieve
Registered
·
September 8, 1992
·
74311898
·
HELISIEVE PLUS
wastewater treatment apparatus; namely, a self-contained municipal and industrial wastewater prescreening sieve
Registered
·
June 14, 1993
·
74401774
·
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