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KIRKHOF MFG CORP

Overview
  • Total Patents
    32
About

KIRKHOF MFG CORP has a total of 32 patent applications. Its first patent ever was published in 1946. It filed its patents most often in United States and Canada. Its main competitors in its focus markets machines, machine tools and electrical machinery and energy are AMERICAN SAFETY CLOSURE, CROWN MACHINE AND TOOL COMPANY and MOJONNIER ALBERT.

Patent filings in countries

World map showing KIRKHOF MFG CORPs patent filings in countries
# Country Total Patents
#1 United States 31
#2 Canada 1

Patent filings per year

Chart showing KIRKHOF MFG CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 O'Brien Robert E 11
#2 Carrigan William H 6
#3 Markowski Edward C 4
#4 Girton Preston E 4
#5 Kirkhof Russel H 4
#6 Roth Dietrich K 3
#7 Medendorp R 3
#8 Keyes Raymond S 2
#9 Emaus Jr William G 2
#10 Medendorp Roger L 2

Latest patents

Publication Filing date Title
US3776374A Anti-theft display container for magnetic tape cartridge
US3837526A Cover for produce carton
US3843019A Denesting apparatus
US3687594A Apparatus for forming a plastic sheet
US3577821A Trim press assembly
US3518334A Method of forming three dimensional plastic articles
US3388625A Sheet-forming and post-forming trim method and apparatus
US3460685A Article stack former,regulator,and handler
US3327344A Plastic article forming and handling system
US3315841A Destacker having reciprocating tray discharge means
US3340574A Universal forming press
US3348748A Plastic sheet advancing apparatus
US3359600A Sheet preheating and forming method and apparatus
US3329995A Sheet forming and post-forming trim method and apparatus
US3321807A Universal magnetic die plate
US3420004A Formed plastic article de-sliver unit
US3318283A Cake circle
US3330423A Stacking device
US3321888A Plastic bag forming machine
US3308213A Vacuum forming die and method