G01C 9/34
Of the tubular type, i.e. for indicating the level in one direction
Official title: of the tubular type, i.e. for indicating the level in one direction only
G01C9/34 (Of the tubular type, i.e. for indicating the level in one direction) appears on 204 US grants and 211 published applications in this corpus.
Search patents in G01C- Granted patents
- 204
- Published applications
- 211
- Assignees
- 78
- Inventors
- 337
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 3 |
| 2003 | 2 | 1 |
| 2004 | 3 | 2 |
| 2005 | 3 | 4 |
| 2006 | 1 | 3 |
| 2007 | 0 | 4 |
| 2008 | 3 | 5 |
| 2009 | 3 | 4 |
| 2010 | 3 | 1 |
| 2011 | 2 | 2 |
| 2012 | 2 | 4 |
| 2013 | 1 | 2 |
| 2014 | 3 | 3 |
| 2015 | 4 | 13 |
| 2016 | 6 | 17 |
| 2017 | 9 | 17 |
| 2018 | 16 | 13 |
| 2019 | 11 | 9 |
| 2020 | 13 | 19 |
| 2021 | 25 | 23 |
| 2022 | 18 | 16 |
| 2023 | 20 | 14 |
| 2024 | 11 | 11 |
| 2025 | 10 | 11 |
| 2026 | 9 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Speed square with highly visible level6 Oct 2026US 12,754,003 B2
- Leveling method and leveling system21 Jul 2026US 12,687,393 B2Fulian Precision Electronics (Tianjin) Co., LTD.
- Measuring device14 Jul 2026US 12,681,176 B2
- Construction surface flatness detector30 Jun 2026US 12,669,328 B2Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.
- Level with captured magnetic strip2 Jun 2026US 12,644,703 B2Apex Brands, Inc.
- Tri Outward Swivel Vial Level8 Oct 2026US 2026/0309492 A1
- Improved Illuminated Level1 Oct 2026US 2026/0298629 A1
- Rotating Laser having at Least One Inclination Sensor24 Sep 2026US 2026/0287353 A1Robert Bosch GmbH
- Measuring rod with detachable components30 Jul 2026US 2026/0219019 A1
- Measurement apparatus with pendulum-based plumb indication and fluid-based level indication16 Jul 2026US 2026/0202198 A1
Most cited
By later US patents
- Clamping level tool85US 8,061,051 B2Swanson Tool Company, Inc. · 2011
- Picture hanging device66US 5,103,573 A1992
- Car seat level indicator57US 5,058,283 ACentury Products Company · 1991
- Pipe bending level48US 5,167,075 AAll-Pro Level, Inc. · 1992
- Multipurpose combination leveling tool44US 5,103,569 AThe Level Corporation · 1992