The felt tip pin thing ~ this site says the first one was made in 1953 http://inventors.about.com/library/inventors/blpen.htm so do you have a source of some kind that says there were no felt tip markers in existence by 1961 that technology having fallen short of any further development or interest?
Excerpt from the web site that you cited:
“Highlighters and fine-line markers were first seen in the 1970’s. Permanent markers also became available around this time. Superfine-points and dry erase markers gained popularity in the 1990’s.
The modern fiber tip pen was invented by Yukio Horie of the Tokyo Stationery Company, Japan in 1962. The Avery Dennison Corporation trademarked Hi-Liter® and Marks-A-Lot® in the early ‘90s. The Hi-Liter® pen, commonly known as a highlighter, is a marking pen which overlays a printed word with a transparent color leaving it legible and emphasized.”
A signature as seen on the Obama COLB would have had to be done with a “fine-tip” marker.