Inventions You Didn’t Know Were Made By Women Modern Paper Bag Paper bags used to look a lot like envelopes. It wasn’t until Margaret Knight invented a machine to attach flat bottoms to the bags that they became what we think of as modern paper bags. Margaret got the patent for her machine in 1871. Previous Next 1 2 3 4 5 6 7 8 9 10 11 12 13 14 2020-03-31 admin Share ! tweet