1955
Dover is founded [Composed of four companies: Rotary Lift1,
C. Lee Cook, Norris, and Peerless2; goes public in 1956]
¹Dover Elevator later an independent operating company after an internal spin-off from Rotary [Divested in 1999]
²Peerless was divested in 1977

1958
Shepard-Warner by Elevator

1961
OPW [Split to form Civacon, OPW Engineered Systems, and OPW Fueling Components (OPW-FC)]
Monarch Elevators by Elevator

1962
Alberta Oil Tool by Norris [Later a stand-alone]
Parks Equipment by Norris [Later renamed Norriseal]
Anderson-Priest by Elevator
Elevator Sales/Service
DE-STA-CO [Split to form DE-STA-CO Manufacturing and DE-STA-CO Industrial Products; DE-STA-CO Manufacturing divested in 2004]

1963
Acme Elevator by Elevator
Walter O’Bannon by Norris

1964
Hunter-Hayes by Elevator
Elevator Service by Elevator
Reddy Elevator by Elevator
Blackmer Pump

1965
Moody & Rowe by Elevator
Burch by Elevator

1966
Turnbull by Elevator

1967
Groen [Later became foundation for platform company Unified Brands]

1968
Ronningen-Petter [Divested in 2006]
Burlington by Elevator

1970
Bernard Welding [Divested in 2001]

1971
Davenport [Divested in 2000]
Hammond & Champness by Elevator [Divested in 1997]

1973
Louisiana Elevator by Elevator
Ernest Holmes [Divested in 1987]

1974
W. W. Moore by Elevator
Campbell-Elevator by Elevator

1975
Dieterich Standard [Divested in 1996]

1977
Waukesha Bearings

1978
Tranter [Divested in 2006]

1979
Universal Instruments [Divested in 2006]

1981
Tipper Tie

1982
Compressor Components by C. Lee Cook
Measurement Systems [Divested in 1996]

1983
Cencorp [Became part of Dovatron; divested in 1993]
Miami Elevator by Elevator
K&L Microwave
Pathway Bellows [Divested in 1999]
DEK Printing
Soltec

1984
Sound Elevator by Elevator
Sincotron [Later restructured as part of Universal, Divested in 2006]
Logic Controls by Norris [Later became part of Norriseal]
Sargent
Corpane [Divested in 1992]

1985
Weldcraft by Bernard [Divested in 2001]
Dielectric by K&L [Later became part of Quadrant]
Lagerquist by Elevator
Arbell [Later restructured as part of Universal, Divested in 2006]
Oscillatek [Later became part of Quadrant]

1986
Manley Valve by C. Lee Cook
Randell
I.S.T. by OPW [Divested in 1991]
Communication Techniques by K&L [Later became part of Quadrant;
divested in 2004]
Nurad [Divested in 1991]
Hawaiian Pacific by Elevator
American Metal Ware [Divested in 1995]
PME by Waukesha [Divested in 1992]
Wolfe Frostop Sales by Groen [Divested in 1991]

1987
Weaver by Rotary Lift [Divested in 1989]
Duncan Industries [Divested in 2003]
Novacap

1988
General Elevator by Elevator
Texas Hydraulics
Ferguson-Beauregard by Norriseal
Pomeco by OPW
Chief Automotive Systems
York-Gregg by Elevator
General Elevator by Elevator
Stark Manufacturing [Later became part of DE-STA-CO Manufacturing;
divested in 2002]

1989
Petro Vend

1990
Wittemann [Divested in 2003]
Marathon
Security Elevator by Elevator

1991
Empire Elevator by Elevator
Hudson Elevator by Elevator

1992
A-C Compressor [Divested in 2001]
B&S Screw Machine Services [Divested in 2000]
Vectron Labs [Later became part of Quadrant]

1993
The Heil Co. [Later split into Heil Trailer and Heil Environmental]
Richland by Tranter [Divested in 2006]
Belvac
TEC [Later became part of Pathway Bellows; divested in 2002]
Phoenix Refrigeration Systems
J&L Tank by Heil Trailer
Dynapert by Universal

1994
Midland
TNI [Later became part of DT Magnetics; divested in 2003]
Koolrad by Tranter [Divested in 2006]
HTT/Swep by Tranter [Divested in 2006]
Reheat AB by Tranter [Divested in 2006]
Technopak by Tipper Tie
Tarby by Blackmer [Divested in 2002]
Midstate Elevator by Elevator
Hill [Merged with Phoenix Refrigeration to become Hill PHOENIX]

1995
Mark Andy [Divested in 2006]
Imaje
Knappco by Civacon
Margaux by Hill PHOENIX
Hasstech by OPW-FC
Hammond Engineering by Blackmer
AT&T FCP by Quadrant [Renamed Vectron Technologies]
Trailmaster by Heil Trailer
GFS by TNI [Divested in 2003]

1996
Everett Charles Technologies (ECT)
PRC by DovaTech [Divested in 2004]
Light Machines by Davenport [Divested in 2000]
BSL by DEK [Later became part of ECT]
Dow Key by K&L Microwave
Robohand by DE-STA-CO Industries
Marte by Rotary Lift
RealCold by Wittemann [Divested in 2003]
KVG by Vectron
Tulsa Winch

1997
Hydro Systems
Quarzkeramik by Vectron
Telefilter by Vectron
Luther & Maelzer by ECT
ESH by ECT
Circuit Test by ECT
Swep Aust. by Tranter [Divested in 2006]
L&E by Pathway [Divested in 2004]
K&K by DovaTech [Divested in 2001]
Emmert by DE-STA-CO
EOA by DE-STA-CO Industries
Preco by A-C Compressor [Divested in 2001]
Conmec by A-C Compressor [Divested in 2001]
Mouvex by Blackmer
Vitronics by Soltec [Divested in 2006]
SWF Companies [Divested in 2007]

1998
Quartzdyne
ThermoFluid by Tranter [Divested in 1999]
Thompson Carmichael by Heil Trailer
Wiseco [Became foundation for platform company Performance Motorsports (PMI)]
Gemini by Elevator
Nova by Hydro Systems
Sonic by Sargent Controls
Avtec by Randell
PDQ
Wilden Pump
CCMOP by DE-STA-CO Industries
Koolant Koolers by DovaTech [Divested in 2005]
ProX by Wiseco

1999
EMA by DE-STA-CO Industries
Van Dam by Mark Andy [Divested in 2004]
Alphasem by Universal [Divested in 2006]
Hydra-Tight by Waukesha [Divested in 2005]
Graphics Microsystems
TTI Testron by ECT
Richards Ind. by OPW
Somero [Divested in 2005]
JE Piston by Wiseco
Parts Inc. by Heil Environmental
Advantage Lifts by Rotary
Lee Laser by DovaTech [Divested in 2004]
Forward Manufacturing by Rotary
Arcom by Quadrant [Liquidated in 2002]
Crenlo
HAS by Sargent Controls
DP Manufacturing by Tulsa Winch
Heil Asia by Heil Trailer

2000
Sure Seal by Civacon
Yakima Wire Works by SWF Companies [Divested in 2007]
Triton Systems
Prime Yield Systems by ECT
Hydro-Cam Engineering by
DE-STA-CO Manufacturing [Divested in 2004]
Gerald L. Greer by Tulsa Winch
Hoegger Alpina by Tipper Tie
Hydromotion by Texas Hydraulics
Salwasser Manufacturing by
SWF Companies
Provacon by Midland
Groupe Aoustin by Ronningen-Petter [Divested in 2007]
C&H Manufacturing by Sargent Controls
System One Pump by Blackmer
Syfer Technology by Novacap
Vertex Piston S.p.A. by Wiseco
Kesseltronics Systems by PDQ
National Cooler by Hill PHOENIX
Pullmaster Winch by Tulsa Winch
RG Industries by AOT
OK International
Vitech by ECT
Cinox by Quadrant
Kalyn Siebert by Heil Trailer [Divested in 2007]

2001
CPI Products by
DE-STA-CO Industries
Bayne Machine Works by Heil Environmental
Adhoc Identity Card by Imaje
Schreiber Engineering by DovaTech [Divested in 2005]
Comco by Mark Andy [Divested in 2006]
Tisma Machinery by SWF Companies [Divested in 2007]
Kurz-Kasch [Divested in 2007]
MultiTest AG by ECT
Markpoint Holding AB by Imaje
Carrillo Industries by PMI
Federal-Mogul RPB by Waukesha Bearings
Perfect Bore by PMI [Divested in 2007]

2002
Impell Purification Tech by OK International
Brevetti Nettuno by OPW-FC
Emco Electronics by OPW-FC
Acumen Technology by DEK
Hover-Davis [Divested in 2006]
Chambon S.A. by PMI [Divested in 2007]

2003
Airborne & Arell by Sargent Aerospace Canada
Blitz M. Schneider GmbH by Rotary Lift
Temex by Vectron
Warn Industries
Wabash Magnetics Control by Kurz-Kasch [Divested in 2007]
Curt May by Imaje

2004
Flexbar by Energy Products Group
SSE GmbH by Alphasem [Divested in 2006]
Voltronics by Dielectric Laboratories
Rasco AG by ECT
Corning Frequency Controls by Vectron
US Synthetic by Energy
Products Group
Almatec by Wilden
Datamax

2005
Avborne Accessory Group by Sargent
Rostone by Kurz Kasch [Divested in 2007]
Fas-Co Coders by Imaje
APG Test Consultants by ECT
C-Tech Energy Services by EPG
Colder Products Company
Harbor Electronics by ECT
Knowles Electronics Holdings
Compressor Valve Engineering by C. Lee Cook
Epsilon Dry Lok by OPW Engineered Systems

2006
Cash Point Machines by Triton
InfoCash Limited by Triton
O’Neil Product Development by Imaje
Paladin Brands Holding
Environ by OPW
Fueling Components
Markem Corporation
Magnum Systems, Inc. by Paladin

2007
Biode by Vectron
Pole/Zero Corporation by MPG
Theta Enterprises by EPG
Hanmecson by Rotary Lift
Griswold Pump by Wilden