 Hugo Borchardt - Firearms Patents: Encyclopedia II - Hugo Borchardt - Firearms PatentsU.S.
#185,721 26th September, 1876
#206,217 23rd July, 1878
#273,448 6th March, 1883
#571,260 1896
#987,543 21st March, 1911
Germany
#75,837 9th September, 1893
#77,748 18th March, 1894
#91998 10th October, 1896
#227,078 27th February, 1909
British
#18,774 1st November, 1893
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