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Astigmatic Eye-Piece For Optical Instruments Patent Print - Old Look Patent Title: Astigmatic Eye-piece For Optical Instruments Inventor...read more
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Astigmatic Eye-Piece For Optical Instruments Patent Print - Old Look Patent Title: Astigmatic Eye-piece For Optical Instruments Inventor Name: Joseph Kornblum; John A. Brashear; Park Painter Year Issued: August 13 1889 Item Number: 14825 R...