B43L 13/001
Mathematical drawing instruments
Official title: {Mathematical drawing instruments}
B43L13/001 (Mathematical drawing instruments) appears on 53 US grants and 49 published applications in this corpus.
Search patents in B43L- Granted patents
- 53
- Published applications
- 49
- Assignees
- 6
- Inventors
- 75
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 3 | 3 |
| 2005 | 3 | 4 |
| 2006 | 7 | 5 |
| 2007 | 9 | 6 |
| 2008 | 5 | 4 |
| 2009 | 2 | 1 |
| 2010 | 1 | 3 |
| 2011 | 1 | 1 |
| 2012 | 3 | 5 |
| 2013 | 3 | 0 |
| 2014 | 1 | 3 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 2 | 4 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Straight-edge drawing guide19 May 2026US 12,629,958 B2
- Drawing assisting tool29 Aug 2023US 11,738,591 B2
- Multifunctional writing device for automatic exam proctoring and grading10 Aug 2021US 11,084,318 B2
- Angle trisector, as validated to perform accurately over a wide range of device settings by a novel geometric forming process; also capable of portraying finite lengths that only could be approximated by means of otherwise applying a compass and straightedge to a given length of unity; that furthermore functions as a level whose inherent geometry could be adapted for many other uses such as being incorporated into the design of a hydraulic car lift4 May 2021US 10,994,569 B2
- Plotter apparatus and methods for drawing a polygon inscribed within a circle30 Apr 2019US 10,272,716 B2
- Improved geometrical instrument11 Jun 2026US 2026/0158815 A1
- Multifunctional ruler for design and multi-scale measurements1 Jan 2026US 2026/0002765 A1
- Dividing a straight or curved line into "n" number of equal subparts29 May 2025US 2025/0170850 A9
- Dividing a straight or curved line into "n" number of equal subparts22 Aug 2024US 2024/0278594 A1
- Straight-edge drawing guide8 Feb 2024US 2024/0042792 A1
Most cited
By later US patents