Filtered pipes have been around in one form or another for decades. According to this article on Pipedia.org, the Dr Grabow paper filter was first patented in 1932. This was not the first such paper filter on the market, however; the German firm Vauen introduced the Dr Perl paper filter more than a decade earlier… Continue reading Repairing a 9mm Tenon on a Stefano Exclusive Tomato
dadspipes.com 