B43L 13/02
Draughting machines or drawing devices for keeping parallelism
Official title: Draughting machines or drawing devices for keeping parallelism (T-squares B43L7/02)
B43L13/02 (Draughting machines or drawing devices for keeping parallelism) appears on 356 US grants and 94 published applications in this corpus.
Search patents in B43L- Granted patents
- 356
- Published applications
- 94
- Assignees
- 124
- Inventors
- 504
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 7 | 0 |
| 1978 | 17 | 0 |
| 1979 | 19 | 0 |
| 1980 | 15 | 0 |
| 1981 | 19 | 0 |
| 1982 | 22 | 0 |
| 1983 | 14 | 0 |
| 1984 | 19 | 0 |
| 1985 | 19 | 0 |
| 1986 | 11 | 0 |
| 1987 | 12 | 0 |
| 1988 | 17 | 0 |
| 1989 | 15 | 0 |
| 1990 | 10 | 0 |
| 1991 | 8 | 0 |
| 1992 | 10 | 0 |
| 1993 | 8 | 0 |
| 1994 | 11 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 3 |
| 2003 | 1 | 2 |
| 2004 | 1 | 3 |
| 2005 | 4 | 8 |
| 2006 | 4 | 9 |
| 2007 | 8 | 6 |
| 2008 | 3 | 2 |
| 2009 | 4 | 3 |
| 2010 | 2 | 2 |
| 2011 | 1 | 3 |
| 2012 | 5 | 4 |
| 2013 | 3 | 1 |
| 2014 | 3 | 2 |
| 2015 | 0 | 3 |
| 2016 | 1 | 1 |
| 2017 | 1 | 5 |
| 2018 | 3 | 5 |
| 2019 | 0 | 4 |
| 2020 | 7 | 1 |
| 2021 | 1 | 8 |
| 2022 | 5 | 5 |
| 2023 | 5 | 8 |
| 2024 | 5 | 2 |
| 2025 | 4 | 3 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Cutting plotter14 Aug 2025US 2025/0256421 A1Graphtec Corporation
- Decolorizing apparatus13 Mar 2025US 2025/0085173 A1Toshiba Tec Kabushiki Kaisha
- Carpenter Tools20 Feb 2025US 2025/0058580 A1
- Multi-purpose analogue device for tracing curves and geometric transformations26 Sep 2024US 2024/0316981 A1Machines4Math S.R.L.
- Drawing system2 May 2024US 2024/0139486 A1BIC Violex Single Member S.A.
Most cited
By later US patents
- Automated sign generator67US 4,467,525 AGerber Scientific Products, Inc. · 1984
- Drawing machine having automatically replaced writing members and apparatus therefor66US 4,683,476 ABenson, Inc. · 1987
- Plotter with automatic pen-changer41US 4,135,245 AHewlett-Packard Company · 1979
- Multi-function square37US 5,915,806 A1999
- Optical sensor for plotter pen verification31US 5,170,047 AHewlett-Packard Company · 1992