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Patents Thos. S. Sprague & Son. Detroit, Mich.

Patents Thos. S. Sprague & Son. Detroit, Mich. image
Parent Issue
Ann Arbor Argus, February 6, 1891
Day
6
Month
February
Year
1891
Copyright
Public Domain
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OCR Text

PATENTS OBTAINKD In XJ. 3. and all foreign countries Examinations made. Licensea and assignments irawn. Infringements prosecuted in ail Fede -al courts. Advice and pamphletsfree. Scientlfic expert validity opinions f i ven. Nomodelsrequired. :stíib1ished A. I). I8G5. ïhor. S. Spbague & Son, 37 Ccngress Street West, Detroit. Micli.