Force v. Sawyer-Boss Mfg. Co.

Citations

• 111 F. 902
• 1901 U.S. App. LEXIS 4997

Syllabus

<p>1. Patents—Validity—Estoppel to Deny.</p> <p>All persons who join in the sale and assignment of a patent, or participate in the consideration received therefor, are estopped to allege its invalidity, and a corporation of which such persons own all the stock is equally' estopped.</p> <p>2 Same—Infringement—Numbering Machine.</p> <p>The Sawyer patent, No. 402,065, for a numbering stamp, held, infringed as to claims 1 and 2.</p>