US Patent: 447,475
|
Drill and Tap Scale
|
Patentee:
|
|
Bennard H. Pomeroy (exact or similar names) - New York, NY |
Manufacturer: |
Not known to have been produced |
|
Patent Dates:
|
Applied: |
Jan. 27, 1891 |
Granted: |
Mar. 03, 1891 |
Patent Pictures:
[
1 | 2
]
|
|
|
USPTO (New site tip) Google Patents
Report data errors or omissions to steward
Russ Allen.
|
Description: |
Either linear or circular scale which includes tap size, tap drill size, clearance drill size, and a tapering scale for use in determining drill size. |
|