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STEFA INDUSTRI AB

Overview
  • Total Patents
    33
About

STEFA INDUSTRI AB has a total of 33 patent applications. Its first patent ever was published in 1964. It filed its patents most often in Sweden, Germany and United Kingdom. Its main competitors in its focus markets mechanical elements are MUELLER HEINZ KONRAD PROF DR I, KALSI ENG INC and HAREL MECHANICAL PROCESSES LTD.

Patent filings in countries

World map showing STEFA INDUSTRI ABs patent filings in countries
# Country Total Patents
#1 Sweden 11
#2 Germany 6
#3 United Kingdom 5
#4 France 3
#5 United States 3
#6 EPO (European Patent Office) 2
#7 Italy 2
#8 Spain 1

Patent filings per year

Chart showing STEFA INDUSTRI ABs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Mechanical elements

Focus technologies

# Technology
#1 Pistons and sealings
#2 Shafts

Top inventors

# Name Total Patents
#1 Persson Per-Ake 3
#2 Dahlgren Christer Harald 2
#3 Persson P-A 2
#4 Bostroem K 2
#5 Johansson Nils Ake Bertil 2
#6 Gustafson S 2
#7 Johansson Bert Lennart Ingmar 2
#8 Klinteberg Gustav Rune 2
#9 Petersson T 1
#10 Persson L 1

Latest patents

Publication Filing date Title
US4303250A Sealing in an adapter for available sealing grooves
US4285526A Sealing device for bearings, especially roll bearings
GB2014670A Stripper ring for use with a reciprocatable rod
EP0005707A2 Sealing device for bearings, especially roll bearings
EP0005706A2 Sealing device for bearings, especially roll bearings
DE2356349A1 Support ring for sealing piston rings - has interlocking ends to withstand tension and compression
GB1270856A An annular sealing ring and a method of forming the same
GB1220985A Axial sealing ring for reversibly rotating shafts
GB1212715A Shaft sealing ring