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GROTNES MACHINE WORKS INC

Overview
  • Total Patents
    125
About

GROTNES MACHINE WORKS INC has a total of 125 patent applications. Its first patent ever was published in 1951. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets machine tools, machines and transport are TI AUTOMOTIVE, UMIX CO LTD and GOLOVASHCHENKO SERGEY FEDOROVICH.

Patent filings in countries

World map showing GROTNES MACHINE WORKS INCs patent filings in countries

Patent filings per year

Chart showing GROTNES MACHINE WORKS INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Stettler Christian H 20
#2 Luedi Hans R 15
#3 Fencl Vernon R 12
#4 Garver Oscar W 11
#5 Kopp Hans W 10
#6 Ullman Frederick E 10
#7 Hess Johann T 8
#8 Fencl V 6
#9 Leer Oscar J Van 6
#10 Tan Aujit 6

Latest patents

Publication Filing date Title
US4187406A Machine for welding seams in automotive wheel rim blanks
AU2757377A Wheel rim blank welding machine
US4018634A Method of producing high strength steel pipe
US3981172A Method and apparatus for expanding spirally welded pipe
US4050135A Flat base truck rim forming system
US3991620A Apparatus for determining imbalance of tires and the like
AU8006175A Truck rim forming apparatus
US3952630A Truck rim edge milling apparatus
US3934324A Method and apparatus for forming automotive wheel rim blanks
US3907371A Drop center truck rim and method of forming same
DE2434108A1 Welding of rolled lorry wheel rims - equipment and conveying reduced to minimum for mass production
US3850017A Truck rim edge deburring apparatus
US3862563A Truck rim forming apparatus
US3797088A Method of manufacturing cylindrical blanks
DE2237451A1 METHOD OF WRAPPING A PIPE
US3756063A Shrink forming apparatus with axial run-out tooling
US3797531A Clamp and reinforcing ring for pipe wrapping
US3823883A Apparatus for wrapping pipe with multiple strips
US3736787A Method and apparatus for forming convoluted metal annulus
US3583200A Expanding head and improved seal therefor