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Heinrich Friederich
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Altenstadt, DE
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Patents Grants
last 30 patents
Information
Patent Grant
Hole-forming and thread-forming screw
Patent number
8,348,572
Issue date
Jan 8, 2013
Ejot GmbH & Co. KG
Heinrich Friederich
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Screw with a partially hardened functional tip and process for the...
Patent number
7,247,099
Issue date
Jul 24, 2007
EJOT GmbH & Co. KG
Heinrich Friederich
C21 - METALLURGY OF IRON
Information
Patent Grant
Semifinished and finished products made of austenitic special steel...
Patent number
6,811,622
Issue date
Nov 2, 2004
Heinrich Friederich
C21 - METALLURGY OF IRON
Information
Patent Grant
Screw connection
Patent number
6,540,462
Issue date
Apr 1, 2003
EJOT Verbindungstechnik GmbH & Co.
Bernd Bretschneider
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Self-tapping, corrosion-resistant screw with hardened tip
Patent number
6,338,600
Issue date
Jan 15, 2002
EJOT Verbindungstechnik GmbH & Co. KG
Heinrich Friederich
C21 - METALLURGY OF IRON
Patents Applications
last 30 patents
Information
Patent Application
SELF-TAPPING DRILL SCREW
Publication number
20090311075
Publication date
Dec 17, 2009
EJOT GmbH & Co. KG
Michael Achenbach
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
HOLE-FORMING AND THREAD-FORMING SCREW
Publication number
20090311074
Publication date
Dec 17, 2009
Heinrich Friederich
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
Cold-rolled fixing screw comprising a self-tapping thread
Publication number
20070122251
Publication date
May 31, 2007
Heinrich Friederich
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Application
Light metal thread-forming screw fastener and method for making same
Publication number
20070110544
Publication date
May 17, 2007
EJOT VERBINDUNGSTECHNIK GMBH & CO. KG
Heinrich Friederich
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Application
Fixing element comprising a low-alloyed steel and process for the p...
Publication number
20070062620
Publication date
Mar 22, 2007
EJOT GmbH & Co. KG
Heinrich Friederich
C21 - METALLURGY OF IRON
Information
Patent Application
Fixing element comprising a low-alloyed steel and process for the p...
Publication number
20060185768
Publication date
Aug 24, 2006
EJOT VERBINDUNGSTECHNIK GMBH & CO. KG
Heinrich Friederich
C21 - METALLURGY OF IRON
Information
Patent Application
Screw with a partially hardened functional tip and process for the...
Publication number
20040235576
Publication date
Nov 25, 2004
EJOT GmbH & Co. KG
Heinrich Friederich
C21 - METALLURGY OF IRON
Information
Patent Application
Screw element with a spring element formed thereon
Publication number
20040208724
Publication date
Oct 21, 2004
EJOB GmbH & Co KG
Heinrich Friederich
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
Fastening element made of carbon-containing steel and method for th...
Publication number
20040154705
Publication date
Aug 12, 2004
Heinrich Friederich
C21 - METALLURGY OF IRON
Information
Patent Application
Light alloy thread-forming screw and its production method
Publication number
20020051695
Publication date
May 2, 2002
Heinrich Friederich
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Application
SELF-TAPPING CORROSION RESISTANT SCREW WITH HARDENED TIP
Publication number
20010014262
Publication date
Aug 16, 2001
EJOT VERBINDUNGSTECHNIK GMBH & CO. KG
HEINRICH FRIEDERICH
C21 - METALLURGY OF IRON