N'afọ 1931, Parker mepụtara Quink (nkume na-ehicha ngwa ngwa), nke kpochapụrụ mkpa maka blotting. N'afọ 1941, ụlọ ọrụ ahụ mepụtara ụdị ụdị pen nke a na-ejikarị eme ihe n'akụkọ ihe mere eme (ihe karịrị $ 400 nde na ahịa ya n'ime afọ 30 ya), Parker 51. E guzobere ụlọ ọrụ mmepụta ihe n'ime afọ ndị a na Canada, United Kingdom, Denmark, France, Mexico, USA, Pakistan, India, Germany (Osmia-Parker), Brazil na Argentina. Ajụjụ: kedu ụdị ihe eji ede ihe kachasị ewu ewu tupu pen pen?
Parker