Inventor
GRONINGA KIRK L
US29 patents
⚠️ This page may combine multiple inventors who share the name “GRONINGA KIRK L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BELL TEXTRON INC
11 patentsUS11091258B2Aug 17, 2021
VTOL aircraft with tilting rotors and tilting ducted fans
BELL TEXTRON INC34 citations94
US12246827B1Mar 11, 2025
VTOL aircraft with tilting rotors and tilting ducted fans
BELL TEXTRON INC2 citations74
US11873085B2Jan 16, 2024
VTOL aircraft with tilting rotors and tilting ducted fans
BELL TEXTRON INC2 citations73
US11613375B2Mar 28, 2023
Dual motor input with overrunning clutch
BELL TEXTRON INC2 citations73
US11718397B2Aug 8, 2023
Electric tiltrotor aircraft
BELL TEXTRON INC1 citations72
US11807357B2Nov 7, 2023
Tilting hexrotor aircraft
BELL TEXTRON INC2 citations71
US11097838B2Aug 24, 2021
Duct with optimized horizontal stator shape
BELL TEXTRON INC0 citations62
US11542020B2Jan 3, 2023
Electric aircraft side access batteries and single file passenger seating
BELL TEXTRON INC1 citations61
US12168508B2Dec 17, 2024
Tilting hexrotor aircraft
BELL TEXTRON INC1 citations58
US11117655B2Sep 14, 2021
Counter-rotating tail rotor
BELL TEXTRON INC0 citations52
US12528579B2Jan 20, 2026
Tilting hexrotor aircraft
BELL TEXTRON INC0 citations47
BELL HELICOPTER TEXTRON INC
10 patentsUS10421541B2Sep 24, 2019
Aircraft with tilting cross-flow fan wings
BELL HELICOPTER TEXTRON INC14 citations85
US10730622B2Aug 4, 2020
Personal air vehicle with ducted fans
BELL HELICOPTER TEXTRON INC6 citations73
US10589855B2Mar 17, 2020
Tiltrotor aircraft with outboard fixed engines
BELL HELICOPTER TEXTRON INC2 citations73
US10836481B2Nov 17, 2020
Biplane tiltrotor aircraft
BELL HELICOPTER TEXTRON INC4 citations72
US10427780B2Oct 1, 2019
Electric cold flow tipjet rotorcraft
BELL HELICOPTER TEXTRON INC2 citations72
US10377480B2Aug 13, 2019
Apparatus and method for directing thrust from tilting cross-flow fan wings on an aircraft
BELL HELICOPTER TEXTRON INC3 citations72
US11286036B2Mar 29, 2022
Ducted rotor blade tip extension
BELL HELICOPTER TEXTRON INC0 citations58
US11286037B2Mar 29, 2022
Ducted rotor blade tip extension
BELL HELICOPTER TEXTRON INC0 citations58
US10479495B2Nov 19, 2019
Aircraft tail with cross-flow fan systems
BELL HELICOPTER TEXTRON INC0 citations51
US10633086B2Apr 28, 2020
Rotorcraft anti-torque and directional control using a centrifugal blower
BELL HELICOPTER TEXTRON INC0 citations48
TEXTRON INNOVATIONS INC
6 patentsUS8636246B2Jan 28, 2014
Aircraft wing extension and nozzle system
TEXTRON INNOVATIONS INC23 citations92
US12246819B1Mar 11, 2025
Thrust vectoring pylon arrangement and method therefor
TEXTRON INNOVATIONS INC3 citations66
US12466553B2Nov 11, 2025
VTOL aircraft with tilting rotors and tilting ducted fans
TEXTRON INNOVATIONS INC0 citations62
US11970283B2Apr 30, 2024
Dual motor input with overrunning clutch
TEXTRON INNOVATIONS INC0 citations62
US12534197B2Jan 27, 2026
Electric tiltrotor aircraft
TEXTRON INNOVATIONS INC0 citations61
US12240600B2Mar 4, 2025
Electric tiltrotor aircraft
TEXTRON INNOVATIONS INC0 citations61