Patent drawing - Vaporization-pipe-w-flame-filter2 Public domain image
Summary
Image from U.S. Patent application 10/639,344 for a "Vaporization pipe with flame filter"
28. Tobacco, herbs or essential oils
36. Flame filter made of heat resistant porous material or a stack of metal screens (5 or so)
38. Housing surrounding flame filter
Tags
Date
12/08/2003
Source
USPTO
Copyright info
public domain