G09B 23/04
For geometry, trigonometry, projection or perspective
Official title: for geometry, trigonometry, projection or perspective (for surveying G09B25/06)
G09B23/04 (For geometry, trigonometry, projection or perspective) appears on 114 US grants and 81 published applications in this corpus.
Search patents in G09B- Granted patents
- 114
- Published applications
- 81
- Assignees
- 30
- Inventors
- 181
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 7 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 2 | 4 |
| 2005 | 2 | 4 |
| 2006 | 4 | 2 |
| 2007 | 1 | 1 |
| 2008 | 2 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 3 |
| 2011 | 1 | 4 |
| 2012 | 2 | 2 |
| 2013 | 4 | 1 |
| 2014 | 0 | 3 |
| 2015 | 5 | 8 |
| 2016 | 6 | 9 |
| 2017 | 4 | 1 |
| 2018 | 7 | 7 |
| 2019 | 7 | 10 |
| 2020 | 2 | 3 |
| 2021 | 5 | 6 |
| 2022 | 3 | 1 |
| 2023 | 6 | 3 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rotational device12 May 2026US 12,626,613 B1
- Pickagram three-dimensional puzzle7 Oct 2025US 12,434,133 B2
- Three dimensional cube-like member19 Dec 2023US 11,847,930 B2
- Location-based VR topological extrusion apparatus22 Aug 2023US 11,734,477 B2Concurrent Technologies Corporation
- Mobius zipper interactive teaching and learning device6 Jun 2023US 11,670,192 B2
- Tool for learning spherical design, and methods for using and manufacturing same3 Sep 2026US 2026/0260580 A1
- Improved geometrical instrument11 Jun 2026US 2026/0158815 A1
- Mechanical apparatus for illustrating the relationship between angles and trigonometric functions11 Jun 2026US 2026/0162562 A1
- Education material and mind game11 Jan 2024US 2024/0013678 A1
- Pickagram three-dimensional puzzle21 Dec 2023US 2023/0405450 A1
Most cited
By later US patents
- Educational blocks with enhanced manipulation features90US 5,947,786 A1999
- Spherical body formed of polygonal members76US 5,236,196 A1993
- Geometric modeling kit and method of making same60US 4,701,131 A1987
- Electronic display apparatus53US 4,298,868 A1981
- Toy for forming variable three-dimensional design48US 6,065,968 A2000