Robert Schafer has been granted 9 US patents while listed as an inventor at General Motors . The first was granted in 1987 and the most recent in September 2011. Robert Schafer ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Robert Schafer in Carefree, AZ, US.
Patents per Year Patents granted per year, 1987 to 2011 Bar chart with a peak of 3 patents in 2011. peak 3 1987: 1 patents 1987 2000: 1 patents 2000 2006: 1 patents 2006 2007: 1 patents 2007 2009: 1 patents 2009 2010: 1 patents 2010 2011: 3 patents 2011
Issued Patents All Time
Profile Widget
Showing 1–9 of 9 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
8012643 Gas control and operation method of a fuel cell system for water and gas distribution Peter Willimowski 2011-09-06
$8,689,000
7981557 Gas control and operation method of a fuel cell system for water and gas distribution Peter Willimowski 2011-07-19
$10,314,000
7890269 Method and device for acoustic measurement of the specific density of a gaseous or liquid medium Peter Hauptmann , Alf Püttmer 2011-02-15
$645,000
7651806 Non-flammable exhaust enabler for hydrogen powered fuel cells Daryl Chapman , Prem Menon , David A. Masten , Norm Dill , Daniel B. O'Connell +1 more 2010-01-26
7479336 Gas control and operation method of a fuel cell system for water and gas distribution Peter Willimowski 2009-01-20
$2,666,000
7169491 Flexible system for hydrogen recirculation — 2007-01-30
$18,257,000
7087333 Hydrogen recirculation without a pump — 2006-08-08
$15,820,000
6149973 Process for the coating of the flow channels of a honeycomb form catalytic converter carrier with a dispersion coating Martin Foerster , Ewald Dittrich , Gerhard Birtigh , Walter Leibold , Bernd Mergner +2 more 2000-11-21
4653423 Automatic dishwasher condition indicator — 1987-03-31
