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- Patent n° US-2935044, of 1960-05-03, requested on 1959-01-15, of Raymond L. Spaulding et al, The Parker Pen Company. Fountain pen.
- Patent n° US-2935969, of 1960-05-10, requested on 1955-04-18, of Theodor Kovacs, Günther Wagner - Pelikan. Fountain pen with overflow chamber situated in the front part of the fountain pen body.
- Patent n° FR-1222185, of 1960-06-08, requested on 1958-04-23, Mentmore. Perfectionnements aux porte-plumes réservoirs.
- Patent n° CH-353996, of 1961-04-30, requested on 1958-04-23, of Derrick John Silver, Mentmore. Plume à réservoir.
- Patent n° US-2983254, of 1961-05-09, requested on 1958-04-23, of Derrick John Silver, Mentmore. Fountain pens.
- Patent n° GB-885374, of 1961-12-28, requested on 1958-01-15, of Herbert Gesaja Ochs, Conway Stewart. Improvements in or relating to Fountain Pens.
- Patent n° GB-927251, of 1963-05-29, requested on 1958-04-23, of Derrick John Silver, Mentmore. Improvements in or relating to fountain pens.
- Patent n° GB-948431, of 1964-02-05, requested on 1958-10-03, of Derrick John Silver, Mentmore. Improvements in or relating to fountain pens.
- Patent n° US-3154055, of 1964-10-27, requested on 1960-12-07, of Ray A. Lawton, The Parker Pen Company. Fountain pen.
- Patent n° US-3532436, of 1970-10-06, requested on 1966-12-10, of Fritz König, Montblanc. Feed bar for Fountain Pens.