Skip to content

The Fountain Pen Patent Archive

The instruments that put ink under pressure

Browse Dates Inventors Types About

Spring-loaded valve block

Patent drawing of a hand gripping a cylindrical pen-like sign-writing apparatus, its handle-tube curving via an elbow up to an inverted conical liquid reservoir, with a rolling guide caster arm extending outward for steadying the tool on a surface.

SIGN-WRITER'S APPARATUS.Herman C. Carver · February 9, 1897

United States patent drawings and specifications are works of the U.S. government and are in the public domain — they were never copyrighted. Download them, print them, frame them. Our commentary and descriptions are © 2026 The Fountain Pen Patent Archive.

About · Terms · Privacy · Corrections welcome — this archive gets better when collectors write in.