Table of Contents
Patent X-9689: 1836-06-02, Hydrostatic and pneumatic breaker
Comments
Information Sources
External links
Patent X-9689: 1836-06-02, Hydrostatic and pneumatic breaker
X Number
Date
Inventor
City
Title
Status
X-9689
1836-06-02
Smith Cram
New York, NY
Hydrostatic and pneumatic breaker
Recovered
Comments
Of interest because Cram was a very early sawmill maker, active ca. 1798.
Information Sources
(To be filled in.)
External links
USPTO pdf
"Vintage Machinery" entry for Smith Cram