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H B Engineering Corp

H B Engine
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US3742454A Data retrieval means having multiple position switches Expired / Lapsed 1970-08-28 1973-06-26 24 Details
US3636446A Receiver for detecting signals within a predetermined bandw… Expired / Lapsed 1970-03-04 1972-01-18 12 Details