Granted Patent
Utility
US 4,438,715 · App. 06/207,538
Buttonhole sewing repair
Inventors:
William H. Dunn, William Joseph Edwards, Philip F. Minalga
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: Nov 17, 1980
Inventors
William H. Dunn
William Joseph Edwards
Philip F. Minalga
Assignee (at issue)
The Singer Company 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.