I've left my place of employment and I've been fixing up my resume, etc, but while adding to an "Achievements" section, I thought about all the ideas I originally brought up to the company. Being much lower in the hierarchy, my ideas had no bearing, and were commonly ignored or rejected. After over 2 years of my ideas being rejected or ignored, my employer hired someone in a more senior position to handle system architecture, and within his first 2 months of being there, he implemented many of the ideas (and began planning for many of the other ideas as well) I previously mentioned. I mentioned this to my boss in a review, and was basically shrugged off (claims she didn't remember any of it).
I honestly don't care about that since I no longer work there, but I want to know if (even though I didn't get to implement any of them) I'm still able to attribute the ideas to myself and take some credit for it on my resume?
If so, how would I go about adding intangible items to my resume (like ideas that I researched and proposed, but were only later implemented due to someone else's recommendation)?