title: Improvement in Air-Pressure Fluid-Vents.
title: Air-Pressure Fluid-Vents.
creator: Park, Hardy B.
contributor: Hickey, Sephreness M.
contributor: Gray, M. L.
contributor: Norris Peters Co.
publisher: United States. Patent Office.
date: 1877-12-25
language: English
description: Patent for "new and useful improvements in air-pressure automatic
 fluid vents for the use in the discharge of all liquids" (lines 3-6),
 including instructions and illustrations.
subject: Inventions
subject: Science and Technology
subject: air pressure
subject: fluid vents
coverage: United States - Texas - Dallas County
rights: Public Domain
type: Patent
format: [1], 1 p. : ill. ; 23 cm.
format: Text
identifier: pat-no: 198672
identifier: https://texashistory.unt.edu./ark:/67531/metapth166738/
identifier: ark: ark:/67531/metapth166738