The links are the patent number which brings up the first page of the patent (tiff viewer¹ required), a [D] link which checks for the patent in the datamp.org database, a [U] link which will bring up a page showing the patent classification and a [S] link will bring up the patent specification page (generally the first non picture page showing among other things, the patentees name, city and state). The [G] link will bring up the patent at google where a tiff viewer is not needed.
¹AlternaTiff for Windows is available for free from http://www.alternaTiff.com, .
The first four are utility patents issued June 11, 1901. The
remaining six are design patents issued July 30, 1901.
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