Rubber stamp images for Telecards. Colleague Chris MacAskill mentions them in his essay on cake.co, That time in 1994 when Steve Jobs got to use a device like an iPhone: "Placing a thumbs-up icon on a message to show that you liked it felt like something which could catch on."
Photo credit: Josh Carter 2009
Design (logo and user interface graphics) for General Magic, a handheld communicator company founded in 1990. "Rubber stamps" were able to be combined with text messages on digital postcards.