PatentGuessrNo.

A mystery from the patent archives, every day. Six guesses to name the invention.

United States Patent Office
Letters Patent No. 000,000 · 0000
No.
Fig. 1. The invention, witnessed & sworn.
Guess 1 of 6

From the File

Filedsealed…
Scalesealed…
Classsealed…
The claimsealed…
The titlesealed…
Rejected

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