Volume 13, Issue 45
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Features
Improved Method of Operating Valves
Patent Claims - July 17, 1858
Issued from the United States Patent Office
Recent Patented Improvements - July 17, 1858
The Maryland Institute
The Patent Office Bureau
New Patent Hydrant
Important to Patent Agents and Lawyers
Ingenuity Wrongly Applied
Deferred Articles
The Geology of North America
Smallpox and the Poor
Our Board of Health Again
Goodyear's Patent Extension
Commissioner Holt's Decision