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GRUENZWEIG & HARTMANN

Overview
  • Total Patents
    708
About

GRUENZWEIG & HARTMANN has a total of 708 patent applications. Its first patent ever was published in 1906. It filed its patents most often in Germany, France and United Kingdom. Its main competitors in its focus markets materials and metallurgy, civil engineering and machines are ROCKWOOL INT, SAINT GOBAIN ISOVER G & H AG and ASGLAWO GMBH STOFFE ZUM DAEMME.

Patent filings per year

Chart showing GRUENZWEIG & HARTMANNs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Kummermehr Hans 54
#2 Mellem Joachim 34
#3 Wuttke Gerhard 33
#4 Bihy Lothar 24
#5 Ungerer Heinz-Juergen 22
#6 Horres Johannes 18
#7 Sommer Rolf 17
#8 Buchmeier Eduard 17
#9 Hirschmann Klemens 16
#10 Holstein Wolfgang Dr 13

Latest patents

Publication Filing date Title
DE19922592A1 Insulating element of mineral wool, especially for insulating area above roof rafters, comprises one-piece panel element with insulating section and load relieving web with high compression resistance
DE19921284A1 Coated mineral wool product and process for its production
DE19903370A1 Markings on mineral wool products in particular
DE19860040A1 Process for the production of mineral wool products bound with binder, device for carrying them out, mineral wool product produced thereby and composite mineral wool product produced thereby and use of these products
DE19844425A1 Mineral wool insulation board for insulation between rafters and wooden frame constructions as well as processes for the production of such an insulation board
DE19807016A1 Wall cassette for building facades
EP0854251A2 Mineral wool roof insulating slab for flat roofs
DE19747622A1 Insulating board with electromagnetic screen for use in building
DE19746429A1 Cladding layer for building
EP0828040A2 Insulating sleeve for chimneys
DE19728018A1 Tool for inserting felt into compartments
DE19720674C1 Binder for fire resistant mineral wool products
EP0872458A1 Mineral fibre composition
DE19628477C1 Needle aids and their use for the production of needle felts and needle felts produced with them
DE19614571A1 Process for the production of mineral wool products, device suitable therefor and mineral wool product produced therewith
DE19614570A1 Device for shredding mineral melts and method for producing the device
DE19614572A1 Method and device for producing mineral fibers and mineral fiber product produced therewith
DE19612711A1 Addition of reclaimed material during melt blowing of rock wool batts
DE19604238A1 Mineral fiber composition
DE19600299A1 Moldings and method and device for their production