Features
Probable Defeat of the Bad Patent Bills
Extracts from the Letter of the Hon. Benjamin Butterworth, Commissioner of Patents, to the Cincinnati Convention of Inventors
United States Patent office, Washington, March 23, 1884
Improved Refrigerator
Improved Ship Cleaner
The International Electrical Exhibition
Improved Steam Engine
The Remington Drop Hammer
Improved Steel Horse Collar
The New Dynamite Gun
Jade and Jade Objects from Central America
Engineering Inventions - April 5, 1884
Mechanical Inventions - April 5, 1884
Agricultural Inventions - April 5, 1884
Miscellaneous Inventions - April 5, 1884
Departments
- Letters
Correspondence - April 5, 1884
- Recommended
New Books and Publications - April 5, 1884
- Departments
Business and Personal - April 5, 1884
Notes and Queries - April 5, 1884
Index of Inventions - April 5, 1884
Patents
