Features
Important Amendments to the United States Patent Statutes
The Proposed Mammoth Relief Map of the United States
Japanese Patents
Patent Attorneys Appeal
Amendments to the Patent Statutes
Another New Patent Law
The Boston Gas Explosion
Automatic Strength Tester and Vending Machine
Alexander Herrmann Prestidigitator
A Four Sided Dovetail
Insects' Wings-Rapidity of Vibration in Flight
Departments
- Letters
Correspondence - March 20, 1897
- Departments
Recently Patented Inventions - March 20, 1897
Business and Personal - March 20, 1897
Notes and Queries - March 20, 1897
Index of Inventions - March 20, 1897
