Who invented PNG?

Related questions

1. What are PNG files bad for?
2. What does PNG mean?
3. Are PNG files OK for printing?
4. Is BMP better than PNG?
5. Can I print a PNG image?
6. What is the purpose of PNG?
7. What is a PNG file format used for?
8. Do PNG files lose quality?
9. What is a PNG picture?
10. What is a PNG logo?

Tags

1. #early
2. #format
3. #history
4. #motivation
5. #interchange
6. #development
7. #creating
8. #patented
9. #realization
10. #lempel
11. #compression
12. #graphics
13. #welch
14. #unisys
15. #algorithm