That is why he said that 80% are invalidated. The ones you heard about probably fall under the 20%.
Mr. Obvious to the rescue!
Mr. Obvious to the rescue!
("Obviousness" is not just a problem for patent examiners, I see.)
Some facts: http://www.uspto.gov/patents/stats/Reexamination_Information...
Ex parte re-exams result in 66% with claims changed and 11% with all claims canceled. Inter partes re-exams result in 43% with claims changed and 44% with all claims cancelled. Not bad.