A 3D model of U.S. Pat. No. 5,016,559. Cutting edge 1989 bookmark / pen holder technology from the original Thingiverse--the U.S. PTO.
"The combination bookmark and writing instrument holder includes a generally planar marking strip and an integrally molded retaining clip at one end of the marking strip. In the preferred embodiment, the retaining clip includes a pair of generally symmetrical, outwardly jaws that together present a writing instrument retaining channel. The channel includes a writing instrument retaining portion, and an outwardly flared mouth portion for guiding the writing instrument into the retaining portion."