G01N 11/04
Through a restricted passage
Official title: through a restricted passage, e.g. tube, aperture
G01N11/04 (Through a restricted passage) appears on 676 US grants and 588 published applications in this corpus.
Search patents in G01N- Granted patents
- 676
- Published applications
- 588
- Assignees
- 517
- Inventors
- 1,680
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 6 | 0 |
| 1984 | 12 | 0 |
| 1985 | 9 | 0 |
| 1986 | 11 | 0 |
| 1987 | 13 | 0 |
| 1988 | 8 | 0 |
| 1989 | 12 | 0 |
| 1990 | 13 | 0 |
| 1991 | 10 | 0 |
| 1992 | 5 | 0 |
| 1993 | 12 | 0 |
| 1994 | 14 | 0 |
| 1995 | 7 | 0 |
| 1996 | 10 | 0 |
| 1997 | 9 | 0 |
| 1998 | 12 | 0 |
| 1999 | 12 | 0 |
| 2000 | 9 | 0 |
| 2001 | 16 | 7 |
| 2002 | 18 | 20 |
| 2003 | 19 | 24 |
| 2004 | 17 | 22 |
| 2005 | 15 | 10 |
| 2006 | 13 | 12 |
| 2007 | 12 | 9 |
| 2008 | 6 | 12 |
| 2009 | 5 | 13 |
| 2010 | 11 | 14 |
| 2011 | 7 | 17 |
| 2012 | 11 | 19 |
| 2013 | 6 | 24 |
| 2014 | 11 | 24 |
| 2015 | 11 | 18 |
| 2016 | 14 | 28 |
| 2017 | 22 | 31 |
| 2018 | 19 | 34 |
| 2019 | 25 | 28 |
| 2020 | 34 | 39 |
| 2021 | 21 | 26 |
| 2022 | 30 | 36 |
| 2023 | 29 | 44 |
| 2024 | 34 | 27 |
| 2025 | 27 | 27 |
| 2026 | 24 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Measurement of flow rate, density, viscosity, and rheology of multiphase fluids in a pipe6 Oct 2026US 12,754,115 B2Saudi Arabian Oil Company
- Optical measurement of flow parameters22 Sep 2026US 12,742,669 B2Flowlit Ltd.
- Apparatus for high speed image capture during measurement of capillary pressure in a porous sample15 Sep 2026US 12,737,882 B2Ametek, Inc.
- Device and method for rapid detection of blood viscosity based on ultrasonic guided wave of micro-fine metal tube1 Sep 2026US 12,721,529 B2Zhejiang University
- Multi-channel blood viscosity measuring device1 Sep 2026US 12,721,530 B2Biorheologics Co., Ltd.
- Discharge device and control method thereof3 Sep 2026US 2026/0259122 A1LG Innotek Co., Ltd.
- Systems, devices, and methods for rheological measurement of granular media3 Sep 2026US 2026/0259123 A1Massachusetts Institute of Technology
- Particle differential mobility analyzer and particle separating and counting apparatus using the same20 Aug 2026US 2026/0243647 A1Innovative Nanotech Incorporated
- Online measurement system and method for gas flux of gas-liquid interface13 Aug 2026US 2026/0235484 A1China Three Gorges Corporation
- Method of producing metallurgical coke and method of evaluating thermoplasticity30 Jul 2026US 2026/0218057 A1Jfe Steel Corporation
Most cited
By later US patents
- Multi-reservoir pressure control system330US 6,915,679 B2Caliper Life Sciences, Inc. · 2005
- High temperature continuous viscometry coupled with analytic temperature rising elution fractionation for evaluating crystalline and semi-crystalline polymers272US 4,798,081 AThe Dow Chemical Company · 1989
- Apparatus for assaying viscosity changes in fluid samples and method of conducting same243US 5,628,961 AI-Stat Corporation · 1997
- Apparatus for assaying viscosity changes in fluid samples and method of conducting same217US 5,447,440 AI-Stat Corporation · 1995
- Dual riser/single capillary viscometer137US 6,402,703 B1Visco Technologies, Inc. · 2002