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Classified Ad: Thomas S. Sprague & Son

Classified Ad: Thomas S. Sprague & Son image
Parent Issue
Day
4
Month
January
Year
1889
Copyright
Public Domain
Advertisement
OCR Text

Patents obtained in U.S. and all foreign countries Examinations made. Licenses and assignments drawn. Infringements prosecuted in in all Federal courts. Advice and pamphlets free. Scientific expert validity opinions given. No models required. Established A. D. 1865. THOS. S. SPRAGUE & SON, 37 Congress Street West, Detroit, Mich.