Inventor
PARZYNSKI JR DAVID BRUNO
US27 patents
Patents
27 patentsUS10851523B2Dec 1, 2020
Retention system for motor grader bits
CATERPILLAR INC6 citations84
US11401685B2Aug 2, 2022
Serrated blade assembly using differently configured components
CATERPILLAR INC2 citations73
US10889966B2Jan 12, 2021
Drafted tool bit and blade assembly
CATERPILLAR INC4 citations73
US10822770B2Nov 3, 2020
Adapter board with pry points
CATERPILLAR INC5 citations73
US10184226B2Jan 22, 2019
Serrated cutting edge with ceramic insert
CATERPILLAR INC6 citations73
US10125471B2Nov 13, 2018
Scarifier board for motor graders
CATERPILLAR INC4 citations73
US11098584B2Aug 24, 2021
Carbide cutter bit with ribbed sides and conical tip
CATERPILLAR INC2 citations72
US10914050B2Feb 9, 2021
Adapter board with splined bushing
CATERPILLAR INC2 citations69
US12523019B2Jan 13, 2026
Drafted tool bit and blade assembly
CATERPILLAR INC0 citations62
US12516509B2Jan 6, 2026
Lock packing prevention for a bit
CATERPILLAR INC0 citations62
US12486638B2Dec 2, 2025
Protected spring clip for retaining bits
CATERPILLAR INC0 citations62
US12398531B2Aug 26, 2025
Washout protection for a bit
CATERPILLAR INC0 citations62
US11885098B2Jan 30, 2024
Serrated blade assembly using differently configured components
CATERPILLAR INC0 citations62
US11746507B2Sep 5, 2023
Carbide cutter bit with ribbed sides and conical tip
CATERPILLAR INC0 citations62
US11732445B2Aug 22, 2023
Retention system for attaching tool bits to a blade assembly
CATERPILLAR INC1 citations62
US11619031B2Apr 4, 2023
Retention system for motor grader bits
CATERPILLAR INC0 citations62
US12404660B2Sep 2, 2025
Dispersible wear indicator
CATERPILLAR INC0 citations60
US11788251B2Oct 17, 2023
Adapter board bolted joint surface
CATERPILLAR INC0 citations60
US10889959B2Jan 12, 2021
Adapter board bolted joint surface
CATERPILLAR INC1 citations60
US11926989B2Mar 12, 2024
Adapter board with splined bushing
CATERPILLAR INC0 citations59
USD1121689SApr 7, 2026
Cutting edge bit for a motor grader
CATERPILLAR INC0 citations58
USD1107761SDec 30, 2025
Cutting edge bit for a motor grader
CATERPILLAR INC0 citations58
USD1107078SDec 23, 2025
Cutting edge bit for a motor grader
CATERPILLAR INC0 citations58
US12467226B2Nov 11, 2025
Adapter board having a tool bit attachment portion
CATERPILLAR INC0 citations52
US11512456B2Nov 29, 2022
Arcuate bit surface and blade assembly
CATERPILLAR INC0 citations52
US11473273B2Oct 18, 2022
Tool bit having a cylindrical profile and blade assembly
CATERPILLAR INC0 citations52
US12460392B2Nov 4, 2025
Front access for bit retention
CATERPILLAR INC0 citations51