Granted Patent
Utility
US 4,903,778 · App. 07/344,771
Method for rolling sod with grass side out
Inventors:
Gerardus J. Brouwer, Henry Zwambag
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Apr 28, 1989
Inventors
Gerardus J. Brouwer
Henry Zwambag
Assignee (at issue)
Brouwer Turf Equipment Limited
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.