Inventor · Donaueschingen, DE

Friedhelm Keller

1Patents
1h-index
2Co-inventors
22Inventor score

Filing activity: May 15, 1992 → May 15, 1992

Most-cited inventions

PatentTitleAreaCited byStatus
US5255943A Welding sleeve and method for its manufacture Performing Operations; Transporting 9 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.