Inventor
BROWN GREGORY H
US21 patents
⚠️ This page may combine multiple inventors who share the name “BROWN GREGORY H”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PLASTIC SAFETY SYSTEMS INC
18 patentsUS6182600B1Feb 6, 2001
Traffic channeling device
PLASTIC SAFETY SYSTEMS INC58 citations95
US7523715B2Apr 28, 2009
Portable sign and barricade assemblies and plastic molded uprights and light and flag mounts therefor
PLASTIC SAFETY SYSTEMS INC25 citations92
USD406543SMar 9, 1999
Traffic channelizer
PLASTIC SAFETY SYSTEMS INC31 citations92
US7736087B1Jun 15, 2010
Portable highway warning device
PLASTIC SAFETY SYSTEMS INC17 citations84
US7111815B2Sep 26, 2006
Base support for post or other upright
PLASTIC SAFETY SYSTEMS INC14 citations84
US6817805B2Nov 16, 2004
Traffic channelizer devices
PLASTIC SAFETY SYSTEMS INC14 citations84
US9534394B1Jan 3, 2017
Portable modular pedestrian ramp
PLASTIC SAFETY SYSTEMS INC6 citations73
US6769207B1Aug 3, 2004
Portable sign assembly
PLASTIC SAFETY SYSTEMS INC10 citations73
USD486250SFeb 3, 2004
Base support for post or other upright
PLASTIC SAFETY SYSTEMS INC7 citations73
USD486089SFeb 3, 2004
Traffic channelizer
PLASTIC SAFETY SYSTEMS INC7 citations73
US9297127B2Mar 29, 2016
Barricade assembly with foldable legs
PLASTIC SAFETY SYSTEMS INC2 citations62
US7681857B2Mar 23, 2010
Portable sign and barricade assemblies and plastic molded uprights and light and flag mounts therefor
PLASTIC SAFETY SYSTEMS INC2 citations62
US7536973B2May 26, 2009
Plastic blow molded board-like members
PLASTIC SAFETY SYSTEMS INC4 citations62
US7059798B2Jun 13, 2006
Traffic channelizer devices
PLASTIC SAFETY SYSTEMS INC2 citations62
USD471123SMar 4, 2003
Barricade frame
PLASTIC SAFETY SYSTEMS INC5 citations62
US6733205B2May 11, 2004
Guardrail delineators
PLASTIC SAFETY SYSTEMS INC2 citations60
USD542685SMay 15, 2007
Inertial barrier container
PLASTIC SAFETY SYSTEMS INC0 citations52
US12522991B2Jan 13, 2026
Portable collapsible barricade
PLASTIC SAFETY SYSTEMS INC0 citations43