Cylindrical ruler
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 4, 2014
Issued Date -
N/A
app pub date -
Sep 11, 2012
filing date -
Sep 11, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The cylindrical ruler is an elongated, hollow, cylindrical tube of known diameter having an axial slit extending the length of the tube. Indicia defining a circumferential scale are disposed around one end of the tube for measuring the length of an arc. Indicia defining a ruled scale extend lengthwise down the tube adjacent the slit for measuring length and width. Since the tube has a known diameter, it may be used to measure the inner or outer diameter of a pipe, the outer diameter or radius of curvature of a cylindrical lens, etc. The tube may also be used as a drawing tool to draw arcs, circles, or rectilinear lines on a cylindrical object. Preferably, the cylindrical ruler is furnished as a plurality of cylindrical tubes of progressively increasing diameter that can telescope within each other for storage and transport in a protective case.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2012 Application Filing Year
- B43L Class
- 60 Applications Filed
- 49 Patents Issued To-Date
- 81.67 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 7 Citation Count
- B43L Class
- 9.59 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 4, 2026 |
