Inventor

Harry Madison

Inventor

Memphis, TN, US

Overview

1990–2003

Patent span

Fixed constructions

Primary field (CPC E)

Patents· 18 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

E01Bprimary

E01BPermanent way55%

B60FVehicles for use both on rail and on road27%

B61DBody details or kinds of railway vehicles14%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%

PatentTitleYear

6,662,729'Rail anchor spreader'2003 6,595,140'Railway tie plate insertion apparatus and method'2003 6,575,099'Railway tie insertion guide'2003 6,536,354'Railway tie bed scarifier'2003 6,499,937'Material distribution system for stick-like objects'2002 6,089,162'Rail vehicle for tie loading and unloading'2000 5,868,078'Road and rail vehicle using rail wheel drive and apparatus'1999 5,660,115'Vertically actuated rail guide wheels'1997 5,619,931'Road and rail using rail wheel drive and apparatus'1997 5,586,507'Rail guide wheel apparatus with double overcenter linkage'1996 5,542,355'Tie plate track fastener feeder'1996 5,359,815'Profile grinder'1994 5,305,692'Truck mounted tie exchanger with self-aligning tie clamp'1994 5,197,389'Tie replacer'1993 5,186,109'Side shift railway guide wheel apparatus for rail/highway conversion with V-shaped automatic centering surfaces for centering vehicle relative to the rails'1993 5,154,124'Rail engagement apparatus which uses vehicle supension'1992 5,048,424'Tie replacer and method'1991 4,951,573'Tie remover and inserter'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1997Patents assigned to HARSCO CORP (11)· patent assignee history

1990–1994Based in Germantown, TN, US· patent location history

1996–2003Based in Memphis, TN, US· patent location history

1999–2003Patents assigned to HARSCO TECHNOLOGIES CORP (6)· patent assignee history

2002Patents assigned to HARSCO TRACK TECHNOLOGIES (1)· patent assignee history

2002–2003Based in Mt. Pleasant, SC, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HARSCO CORP	11	1990–1997
HARSCO TECHNOLOGIES CORP	6	1999–2003
HARSCO TRACK TECHNOLOGIES	1	2002

Locations

Location	Patents	Span
Memphis, TN, US	7	1996–2003
Germantown, TN, US	7	1990–1994
Mt. Pleasant, SC, US	4	2002–2003