Albert L. Donaldson — 2 Patents at Escom

Albert L. Donaldson has been granted 2 US patents while listed as an inventor at Escom. The first was granted in 2001 and the most recent in July 2007. Albert L. Donaldson ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Albert L. Donaldson in Oakton, VA, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
7249175	Method and system for blocking e-mail having a nonexistent sender address	—	2007-07-24
6321267	Method and apparatus for filtering junk email	—	2001-11-20

Albert L. Donaldson — 2 Patents

Issued Patents All Time

Patent Widget