In early 1990, I co-founded a new, venture capital funded, software development company, Slate Corporation, along with other personal computer industry veterans. Slate's mission was to develop applications software for pen computers. With the lackluster sale of pen computers, Slate closed its doors after four years, and I returned to Software Garden.
I have some of the original pen computers, including the GO Lombard, GO Hyde, GridPad, Grid Convertible, Momenta, and others. I also have copies of much of Slate's products, including the At-Hand spreadsheet, in original packaging. If there is enough interest, I can post pictures of them and other information. Let me know if you are interested.