Baltimore, Maryland
United States
3
2012-06-26
The entities that hold a legal rights for patent applications filed by inventor Friday David:
David Friday from Baltimore, US has applied for patents for these inventions. The list has both pending applications and granted patents:
Residual life indicator
#2 | 2008-07-03Air filtration media comprising metal-doped silicon-based gel and/or zeolite materials treated with nitric acid and/or potassium persulfate
#3 | 2008-07-03Air filtration media comprising metal-doped silicon-based gel materials with nitric acid and/or potassium persulfate
4206030 ⎘