Granted Patent
Utility
US 5,030,261 · App. 07/383,428
Two stage transition input section for dust collectors
Inventors:
Giambattista Giusti, Robert W. Duyckinck
Patented Case
View Patent ↗
Granted: Jul 9, 1991
Filed: Jul 24, 1989
Inventors
Giambattista Giusti
Robert W. Duyckinck
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.