All patents were assigned by their patentees to the company, except those marked with an asterisk (*). These patents were retained by the patentees.
04,217 / (shape) / Chretian Dorflinger / 12 Jul 1870 / (not available) (*)
09,646 / (shape) / Christian Dorflinger / 21 Nov 1876 / 30 Sep 1876 (*)
16,676 / Parisian / John S. O'Connor / 4 May 1886 / 19 Mar 1886
18,732 / Florentine / John S. O'Connor / 13 Nov 1888 / 9 Oct 1888 (*)
22,581 / Colonial / James J. O'Connor / 4 Jul 1893 / 16 Feb 1893
23,807 / Lorraine / James J. O'Connor / 13 Nov 1894 / 13 Sep 1894
40,497 / (unnamed) / Charles O. Northwood / 8 Feb 1910 / 9 Dec 1909
40,498 / Chippendale / Charles O. Northwood / 8 Feb 1910 / 9 Dec 1909
40,499 / Rock Crystal Cosmos / Charles O. Northwood / 8 Feb 1910 / 9 Dec 1909
40,876 / (unnamed) / Charles O. Northwood / 13 Sep 1910 / 14 Jul 1910
The last four patents, above, are neither listed nor shown in Revi (1965). Here they are, beginning with no. 40,497 on the top left and ending with no. 40,876 on the bottom right. Probably neither of these two patterns was produced commercially, so each is "unnamed" here. A factory sample of the former pattern is shown in Feller (1988, p. 228). It is assumed that all four patents were primarily intended for stone-wheel engravings, although Charles O. Northwood, their designer, seems to have been employed by Dorflinger mainly for assistance with the company's acid-etched Kalana and Florida "lines" (Feller 1988, p. 89-90).
Updated 10 Dec 2002