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- Patent n° GB-732982, of 1955-07-06, requested on 1951-07-10, of Theodor Kovacs, Günther Wagner - Pelikan. A Fountain Pen.
- Patent n° DE-941049, of 1956-03-29, requested on 1951-07-10, of Theodor Kovacs, Günther Wagner - Pelikan. Füllfederhalter.
- Patent n° US-2756722, of 1956-07-31, requested on 1952-05-08, of Josef C. Lamy, Lamy. Fountain pen structure.
- Patent n° US-2766728, of 1956-10-16, requested on 1950-07-15, of Theodor Kovacs, Günther Wagner - Pelikan. Fountain pen.
- Patent n° US-2766729, of 1956-10-16, requested on 1951-07-10, of Theodor Kovacs, Günther Wagner - Pelikan. Fountain pen.
- Patent n° US-2770221, of 1956-11-13, requested on 1951-03-29, of William Tonkowich, Waterman. Fountain pen.
- Patent n° CH-318128, of 1956-12-15, requested on 1951-07-10, of Theodor Kovacs, Günther Wagner - Pelikan. Füllfederhalter.
- Patent n° US-2774333, of 1956-12-18, requested on 1950-12-19, of David Kahn, Wearever. Fountain pen with improved feed construction.
- Patent n° DE-1004522, of 1957-03-14, requested on 1954-07-26, of Josef C. Lamy, Lamy. Ausbildung und Anordnung der Tintenfuehrung und der Federbefestigung bei Fuellhaltern.
- Patent n° DE-1008605, of 1957-05-16, requested on 1955-04-18, of Theodor Kovacs, Günther Wagner - Pelikan. Füllfederhalter mit einer im vorderen Teil des Halterschaftes angeordneten Überflußkammer.
- Patent n° FR-1152674, of 1958-02-21, requested on 1955-04-18, of Theodor Kovacs, Günther Wagner - Pelikan. Porte-plume réservoir perfectionné.
- Patent n° GB-795902, of 1958-06-04, requested on 1955-04-18, of Theodor Kovacs, Günther Wagner - Pelikan. Improvements in fountain pens.
- Patent n° DE-1034066, of 1958-07-10, requested on 1955-06-29, of Josef C. Lamy, Lamy. Ausbildung und Anordnung der Luftfuehrung und der Federbefestigung bei Fuellhaltern.
- Patent n° FR-1166468, of 1958-11-12, requested on 1956-10-24, Stylomine. Nouveau conduit support de plume pour porte-plume à réservoir.
- Patent n° FR-1166469, of 1958-11-12, requested on 1956-10-24, Stylomine. Nouveau conduit d'encre pour porte-plume réservoir.
- Patent n° NL-90322, of 1959-03-16, requested on 1951-07-10, of Theodor Kovacs, Günther Wagner - Pelikan. Vulpenhouder.
- Patent n° US-2881737, of 1959-04-14, requested on 1955-10-24, of Donald H. Young, Waterman. Fountain pen feed construction.
- Patent n° CH-341736, of 1959-10-15, requested on 1955-04-18, of Theodor Kovacs, Günther Wagner - Pelikan. Füllfederhalter mit einer im vorderen Teil des Halterschaftes angeordneten Überflußkammer.
- 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.