Robert S. Johnson has been granted 24 US patents while listed as an inventor at Briggs & Stratton . The first was granted in 1985 and the most recent in March 2025. Robert S. Johnson ranks #168,038 of 4,157,543 US inventors in our database (top 4.0%). Patent records list Robert S. Johnson in New Berlin, WI, US.
Patents per Year Patents granted per year, 1985 to 2025 Bar chart with a peak of 3 patents in 2013. peak 3 1985: 2 patents 1985 1991: 1 patents 1994: 2 patents 1994 1997: 1 patents 1998: 1 patents 1998 2000: 1 patents 2001: 1 patents 2001 2004: 1 patents 2011: 1 patents 2011 2012: 2 patents 2013: 3 patents 2013 2019: 2 patents 2020: 2 patents 2020 2022: 2 patents 2023: 1 patents 2023 2025: 1 patents 2025
Issued Patents All Time
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Showing 1–24 of 24 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
12251655 Cyclonic air filter assembly for an engine Steven G. Gleixner 2025-03-18
11712649 Cyclonic air filter assembly for an engine Steven G. Gleixner 2023-08-01
11377996 Muffler with baffle defining multiple chambers Steve Gleixner , Patrick J. Crowley , Brett Birschbach 2022-07-05
11260328 Cyclonic air filter assembly for an engine Steven G. Gleixner 2022-03-01
D896945 Air filter Steven G. Gleixner 2020-09-22
D876600 Air filter Steven G. Gleixner 2020-02-25
D867568 Air filter Steven G. Gleixner 2019-11-19
10422730 Liquid inlet device Thomas Vitella 2019-09-24
8528747 Solid phase extraction disk and method of manufacture Kevin Dinnean , Steve MacDonald 2013-09-10
8443429 Integrated sign on Elton Tila 2013-05-14
$14,838,000
8408183 Ignition and fuel shutoff for engine — 2013-04-02
$1,433,000
8313953 Sample collection system and method Stephen Scheufele 2012-11-20
8124422 Sample collection system and method Stephen Scheufele 2012-02-28
7935536 System for water removal and solvent evaporation Stephen J. MacDonald 2011-05-03
6749755 Water separation from solvent — 2004-06-15
6264895 Evaporator — 2001-07-24
6027638 Automatic filtration and extraction device and method — 2000-02-22
5753105 Automatic filtration and extraction device and method — 1998-05-19
5642701 Engine cylinder head assembly having planar and cast components Denis Oswald , Mark W. Emmer , Daniel W. Edmonds 1997-07-01
$5,677,000
5358542 Glass container forming machine including neck ring mold cooling Robert D. Hall , Roger L. Erb 1994-10-25
5320768 Hydroxy ether amine friction modifier for use in power transmission fluids and anti-wear additives for use in combination therewith Antonio Gutierrez , Jack Ryer , Stanley J. Brois , Jon Michael Clumpner 1994-06-14
$22,702,000
4983203 Cooling device for glass container forming machine Roger L. Erb , Richard L. Smith 1991-01-08
D280769 Sponge mop Paul E. Fletcher , William S. Benjamin , John I. Zsitvay 1985-09-24
4516287 Angled roller mop Paul E. Fletcher , William S. Benjamin , John I. Zsitvay 1985-05-14
