Kirkwood patents, there may be more.

Patent number: 191862
Filing date: Mar 12, 1877
Issue date: Jun 12, 1877
Inventor: DAVID KIEKWOOD
http://www.google.com/patents?id=WbZqAAAAEBAJ&dq=Kirkwood+fire+arm

Patent number: 233773
Filing date: Aug 11, 1880
Issue date: Oct 26, 1880
http://www.google.com/patents?id=BfBwAAAAEBAJ&dq=Kirkwood+fire+arm

Patent number: 240147
Filing date: Dec 2, 1880
Issue date: Apr 12, 1881
Inventor: DAVID KIRKWOOD
http://www.google.com/patents?id=LMxCAAAAEBAJ&dq=Kirkwood+breech

Patent number: 318001
Issue date: May 1885
Inventor: Kirkwood
http://www.google.com/patents?id=EkQWAAAAEBAJ&dq=Kirkwood+breech

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