I believe the color of the infringing meters was deliberately chosen, although Sparkfun was probably not aware of the trademark. I use Flukes and didn't know the coloring was protected.
However, how wide is the range of yellow that is considered to infringe on Fluke's special yellow? How many such ranges can be trademarked before no one can manufacture a solid colored meter boot without infringing on some trademark color.
I suppose at that point we move to stripes, ginghams and paisleys.
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.