Skip to content

The Fountain Pen Patent Archive

The instruments that put ink under pressure

Browse Dates Inventors Types About

Spoon-shaped tongue

Technical patent drawing of a nineteenth-century fountain pen holder showing a nib labeled A, a tubular holder B, and an adjustable spoon-shaped tongue C with a convex guide g, illustrated from side, top, and bottom views along with a detached close-up of the tongue mechanism.

IMPROVEMENT IN RULING-GUIDES FOR FOUNTAIN-PENS.Isaac H. Hobbs · February 19, 1861

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.