I need a short article / 5 case studies written - Companies that failed to innovate

Num. of words: 1200
Industry: Business
Topic: Innovation
Tone: Instructional/Educational
Extra notes: I need 5 case studies to be written. Approx 200-300 words on each case study.

Each case study should give details on a company that was a leader in its industry but failed to innovate. What was good about it at its height? Why / how did it decline? Each case study should ideally show a different reason for failing to innovate or be in a different industry.

The article is aimed at senior leaders and managers.

Thank you.