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Patents for On-The-Dot Level Device
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,281,096Oct. 08, 1918C.F. ThullenLevel devicelevels
CA-196,597Jan. 27, 1920C.F. ThullenLevel devicelevels
1,393,328Oct. 11, 1921C.F. ThullenLevel devicelevels
CA-213,997Oct. 25, 1921C.F. ThullenLevel devicelevels
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