US Patent: 181,236
|
| Improvement in Rulers and Protractors
|
|
Patentee:
|
|
| George D. Wyckoff (exact or similar names) - Indianapolis, IN |
|
|
Patent Dates:
|
| Applied: |
Mar. 15, 1876 |
| Granted: |
Aug. 15, 1876 |
|
Patent Pictures:
[
1 | 2
]
|
|
|
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Ralph Brendler
|
|
Description: |
| This ruler/protractor has a pair of built-in pins to allow it to be easily affixed to a drawing board for marking, as well as a sliding fence to allow it to accurately lay off perpendicular lines. |
|
){kind=link}
%20and%20courtesy%20of%20Martin%20J.%20Donnelly')){kind=link}