Inventor

Helmut Steffes

Inventor

Hattersheim, DE

Overview

1981–2004

Patent span

Performing operations

Primary field (CPC B)

Patents· 75 as inventor

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

B60Tprimary

B60TVehicle brake control systems or parts thereof55%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests16%

F04BPositive-displacement machines for liquids6%

Y10TTechnical subjects covered by former us classification5%

B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for2%

F16DCouplings for transmitting rotation2%

G05DSystems for controlling or regulating non-electric variables2%

B60KArrangement or mounting of propulsion units or of transmissions in vehicles2%

F02DControlling combustion engines2%

F15BSystems acting by means of fluids in general2%

PatentTitleYear

6,705,846'Piston pump'2004 6,497,562'Piston pump'2002 6,454,543'Selectively operable multiple pump assembly'2002 6,450,787'Piston pump'2002 6,220,675'Hydraulic brake system with hydraulic servo brake'2001 6,220,827'Electromotor/pump assembly'2001 6,149,250'Hydraulic brake system with a priming pump for motor vehicles'2000 6,142,583'Anti-locking hydraulic motor vehicle brake system'2000 6,116,146'Radial piston machine'2000 5,924,775'Antiskid hydraulic braking system'1999 5,722,742'Electrohydraulic pressure control mechanism'1998 5,722,741'Electrohydraulic pressure control device'1998 5,700,071'Electrohydraulic pressure control device'1997 5,681,099'Electrohydraulic pressure control device'1997 5,401,085'Brake pressure control apparatus for a hydraulic automotive vehicle brake system'1995 5,388,898'Hydraulic brake system including an anti-locking control'1995 5,383,718'Brake system with a device for controlling both brake slip and traction slip'1995 5,350,226'Anti-lock hydraulic brake system'1994 5,340,285'Motor pump assembly with variably set eccentric'1994 5,297,862'Hydraulic brake system controlling slip'1994 5,295,739'Brake pressure control apparatus'1994 5,290,098'Hydraulic anti-locking brake unit'1994 5,251,971'Anti-lock controlled brake system for automotive vehicles'1993 5,249,853'Hydraulic anti-lock brake system'1993 5,231,913'Process for the adjustment of a brake power booster travel sensor'1993 5,215,359'Hydraulic anti-locking brake unit'1993 5,195,419'Method for assembling a piston-and-cylinder unit and force transmission element'1993 5,188,439'Brake pressure control'1993 5,188,433'Anti-lock hydraulic brake system'1993 5,176,432'Brake pressure control apparatus'1993 5,141,295'Brake power booster with diaphragm position sensing devices'1992 5,115,186'Travel sensor for determining the position of a member such as a brake pedal'1992 5,050,382'Tandem master cylinder for hydraulic brake systems'1991 5,046,316'Tandem master cylinder with filters arranged in central valves'1991 5,029,952'Slip-controlled brake system with a master brake cylinder'1991 5,014,514'Method for assembling a piston-and-cylinder unit with a force transmission element'1991 5,005,350'Tandem master cylinder'1991 4,964,681'Anti-lock hydraulic brake system'1990 4,951,470'Tandem master cylinder'1990 4,950,027'Brake pressure regulator'1990 4,929,038'Hydraulic unit'1990 4,905,570'Hydraulic power booster for a vehicle brake system'1990 4,900,105'Pressure fluid-activated brake system including an anti-locking traction slip control'1990 4,861,117'Brake pressure regulator'1989 4,848,847'Pressure supply system especially for brake systems of motor vehicles'1989 4,840,435'Hydraulic brake system for automotive vehicles with anti-skid control system'1989 4,838,225'Throttle regulator'1989 4,838,305'Pressure differential valve'1989 4,828,333'Slip-controlled brake system'1989 4,828,336'Skid-controlled brake system'1989 4,824,182'Anti-lock hydraulic brake system for automotive vehicles'1989 4,819,997'Slip-controlled brake system'1989 4,815,793'Hydraulic brake system for automotive vehicles'1989 4,811,809'Traction slip control device'1989 4,805,966'Slip-control hydraulic brake booster with braking-pressure responsive valve for fast-fill cylinder'1989 4,769,554'Electrical switching mechanism for circuits in automotive vehicles'1988 4,759,591'Hydraulic brake system'1988 4,736,995'Brake slip control apparatus fed with auxiliary energy for use in a vehicular hydraulic brake system'1988 4,736,993'Hydraulic brake system with slip control for automotive vehicles'1988 4,730,878'Skid-controlled hydraulic brake system'1988 4,693,523'Slip controlled brake system for automotive vehicles'1987 4,687,259'Hydraulic brake system with slip control'1987 4,660,898'Hydraulic brake system with slip control'1987 4,659,152'Hydraulic brake system with slip control'1987 4,643,489'Hydraulic brake system with slip control'1987 4,628,162'Fluid level indicator for a reservoir'1986 4,564,244'Pressure control device'1986 4,543,791'Power brake unit'1985 4,530,209'Control arrangement for a vehicular brake system with hydraulic brake booster'1985 4,489,989'Auxiliary power assisted master cylinder arrangement for a vehicle brake system'1984 4,483,144'Control arrangement for a hydraulic brake system with an antiskid control device'1984 4,404,803'Brake unit with a hydraulic boosting device'1983 4,341,076'Hydraulic brake booster'1982 4,309,934'Hydraulic brake booster'1982 4,263,784'Power brake unit for automotive vehicles'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1987Patents assigned to ITT (12)· patent assignee history

1981–1988Based in Eschborn, DE· patent location history

1986–1998Patents assigned to TEVES GMBH ALFRED (51)· patent assignee history

1987Patents assigned to ALFRED TOVES GMBH (1)· patent assignee history

1988–2004Based in Hattersheim, DE· patent location history

1999–2000Patents assigned to ITT MFG ENTERPRISES INC (3)· patent assignee history

2000–2004Patents assigned to CONTINENTAL TEVES AG & CO OHG (7)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TEVES GMBH ALFRED	51	1986–1998
ITT	12	1981–1987
CONTINENTAL TEVES AG & CO OHG	7	2000–2004
ITT MFG ENTERPRISES INC	3	1999–2000
ALFRED TOVES GMBH	1	1987

Locations

Location	Patents	Span
Hattersheim, DE	58	1988–2004
Eschborn, DE	17	1981–1988