Browse Design Patents
Welcome back. Hope you had a good weekend. In Northern California we had some rain and snow in the Sierra Nevada mountains. Kind of gloomy and dark. Indoor days. Didn't do any hiking but I will on Tuesday or Wednesday.
Here's a good way to browse design patents. Put in what you want to look for and then add the important phrase: ornamental design. Select the quick search option at the patent office:
http://patft.uspto.gov/netahtml/search-bool.html (external link),
and you'll see this form:

Put in what you are looking for, even if it is garbage disposals, the words ornamental design, and then your date range. Only patents from 1976 on can be searched this way. The patents before then haven't yet been made keyword searchable. Try as many different keywords as you can. For public telephones try COCOT, payphone, paystation, and so on. It's great fun looking but it will take the tools I describe below and much time. Save this task for when you do have time to fool around. Like at work.