Assignee
SPRUEGEL FRIEDRICH
DE·2 granted patents·14 citations·filing 1984–2010
Top patents by PatentIndex Score
2 records- 0166US8591666B2Method and apparatus for cleaning particle filters in exhaust gas systems of combustion enginesSPRUEGEL FRIEDRICH·Filed 2010·Granted Nov 26, 2013·3 cites·13 claims
- 0239US4662327AProcess, apparatus and agent for the continuous supply of internal combustion engines and/or auxiliary devices thereof with additivesSPRUEGEL FRIEDRICH·Filed 1984·Granted May 5, 1987·11 cites·9 claims
Join the waitlist — get patent alerts
Get an alert when SPRUEGEL FRIEDRICH files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →