Description
Class B43L : ARTICLES FOR WRITING OR DRAWING UPON; ACCESSORIES FOR WRITING OR DRAWING
Subclass 9/00: Circular curve-drawing or like instruments (curve rulers or templets B43L 13/2)
B43L 9/00
Sub-Class
Stats
- 20 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- 7 Total Patent Owners
- 81 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11999186 | Centerless drafting tool | Feb 11, 22 | Jun 04, 24 | Not available |
| 11110739 | Framing square | May 10, 19 | Sep 07, 21 | Milwaukee Electric Tool Corporation |
| 10471616 | Cutting device for cutting of a round | Sep 08, 17 | Nov 12, 19 | National Taiwan Normal University |
| 9897427 | Educational ruler | Nov 12, 13 | Feb 20, 18 | XING, HAOYU, Shang, Zhi, |
| 9772172 | Scalable rules capable of creating size-adjustable circles, arcs, and curved shapes | Jan 18, 13 | Sep 26, 17 | Not available |
| 9457612 | System and a method for drawing arcs and circle | Mar 07, 16 | Oct 04, 16 | Not available |
| 9308771 | System and a method for drawing arcs and circle | Oct 07, 15 | Apr 12, 16 | Not available |
| 9073381 | Wheeled compass | Oct 16, 14 | Jul 07, 15 | KING SAUD UNIVERSITY |
| 9056236 | Device and method for marking spheres with alignment indicia and the sphere so marked | Oct 18, 12 | Jun 16, 15 | Not available |
| 8875411 | Cylindrical ruler | Sep 11, 12 | Nov 04, 14 | Not available |
| 8844146 | Eyeglass frame shape measurement device | Sep 13, 12 | Sep 30, 14 | NIDEK CO., LTD. |
| 8793884 | Circle cutting tool | Apr 05, 12 | Aug 05, 14 | Not available |
| 8296959 | Self-retaining pipe cutting template | Jul 29, 09 | Oct 30, 12 | Not available |
| 7802369 | Method for designing structure by drawing curve approximately with circular segment, and structure thereby | Aug 01, 08 | Sep 28, 10 | Not available |
| 7500315 | Hole data input device and eyeglass lens processing apparatus having the same | Feb 28, 07 | Mar 10, 09 | NIDEK CO., LTD. |
| 6845678 | Spectacle frame shape measuring apparatus | Apr 07, 03 | Jan 25, 05 | HOYA CORPORATION |
| 6606796 | Drawing tool | Feb 02, 01 | Aug 19, 03 | LEARNING RESOURCES, INC. |
| 6243963 | Dividing rule | May 20, 99 | Jun 12, 01 | Lee Valley Tools Ltd. |
| 5651184 | Circumscribing apparatus | May 03, 95 | Jul 29, 97 | Not available |
| 5347721 | Method and device for drawing curved lines | Mar 30, 93 | Sep 20, 94 | Not available |
Recent Publications
Not Available
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 23 Months (last 2 years Issuances)
- 23 Months (last 5 years Issuances)