There is some confusion over who invented the first binders because back in there was a first patent filed for loose leaf paper and in the same year there were another two patents filed for the a3 binders. Before it was made with a heavy paperboard called binders board and these days a lot of them have plastic covers which are not good for the environment.
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There is some confusion over who invented the first binders because back in there was a first patent filed for loose leaf paper and in the same year there were another two patents filed for the a3 binders. Before it was made with a heavy paperboard called binders board and these days a lot of them have plastic covers which are not good for the environment.