""I was evangelizing like Oral Roberts about the importance of IP," Chaikovsky said. "When I got there, Yahoo had six issued patents and 14 applications." When Siino got there four years later, Yahoo was filing about 100 patent applications a year. Now Yahoo is filing 1,000 patent applications a year, Siino said. Although that's not as many as such massive tech companies as Microsoft or Cisco Systems Inc., patent lawyers say it's a big number for Internet companies, which have always been a little allergic to being viewed as tough enforcers of intellectual property."