1. What does the term 'patent types' refer to?
Different categories of patents based on what they protect, such as utility, design, or plant patents.
Explanation
Patent types refer to the different categories or classifications of patents, such as utility patents, design patents, and plant patents, each protecting different aspects of inventions. The other options describe related but different concepts: application procedures, durations, and infringement processes, not what 'patent types' specifically means.