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1、平底纸袋的发明者——玛格丽特·奈特(1869)玛格丽特·奈特读小学时便已辍学,她居住在麻萨诸州的斯普林费尔德市,酷爱机械装置和小发明。从1867—1869年,她设计出了制造现代平底纸袋的沉重机器。奈特太太生产的纸袋的实用性远远超过当时流行的纸袋,不过奈特太太从这种纸袋的发明中获利甚微,她临死时资产总值仅257.05美元。2、有刺铁丝网的发明者——约瑟夫·格利顿(1874)约瑟夫·格利顿是伊利诺阿州德
1, the inventor of flat paper bag - Margaret Knight (1869) Margaret Knight dropped out of primary school, she lives in Springfield, Massachusetts, love Mechanical devices and gadgets. From 1867-1869, she devised a heavy machine for making modern flat-bottomed paper bags. The usefulness of Mrs. Knight's paper bag was far more pragmatic than that of the popular paper bag at the time, though Mrs. Knight did not make much inroads in the invention of this paper bag and she had a mortal total of just $ 257.05. 2, inventor of barbed wire - Joseph Glutton (1874) Joseph Glutton is Illinois