Hi Mrs Depew, I've been enjoying reading your very informative blog posts, thank you for writing them!
I do have one thing to add though - I got sick of not having an effective way of cataloguing the details of my sewing patterns, so I wrote an app, Sewing Pattern Buddy!
It was designed with vintage pattern collectors very much in mind, there are fields for pattern completeness, era, printed/unprinted, whether you've made it or not, what condition the pattern is in, how many copies owned, etc.
It's currently only available on Android, but I'm working on the iPhone version.
Here's a link to my webpage which tells you all about it:
http://kwirkykiwi.com/sewing-pattern-buddy/And here's a link to the Google Play Store page:
https://play.google.com/store/apps/details?id=com.kwirky.megan.sewingpatternbuddyAnd just so you know, you can store 25 pattern details for free, then if you want to add more, you have to buy the one-time upgrade.
I hope some of you find it useful! :-)