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Roughly in [[1925]] was introduced the [[Platignum]] brand;<ref>this date, like the others for which no precise reference has been indicated, comes from the page dedicated to the company on the Grace Guide website reported in the references.</ref> at this time it seems there has been a kind of reorganization of the company. It seems that the intention was to use the name ''Platinum'', but that this was not registrable as a trademark since it is the name of a metal, so the name was changed slightly and the ''Platignum Pen Company '' was created, that began marketing [[Platignum]] branded pens, focusing on the low-end production in  comparison to the pens distributed with the main brand.  

Roughly in [[1925]] was introduced the [[Platignum]] brand;<ref>this date, like the others for which no precise reference has been indicated, comes from the page dedicated to the company on the Grace Guide website reported in the references.</ref> at this time it seems there has been a kind of reorganization of the company. It seems that the intention was to use the name ''Platinum'', but that this was not registrable as a trademark since it is the name of a metal, so the name was changed slightly and the ''Platignum Pen Company '' was created, that began marketing [[Platignum]] branded pens, focusing on the low-end production in  comparison to the pens distributed with the main brand.  

Sempre relativo al [[1925]] viene riportata la creazione di un gruppo pennino intercambiabile, e la produzione di penne con parti in plastica realizzata con iniezione a stampo. Non vi sono documentazioni sicure di queste affermazioni ma in [[:File:1949-Mentmore-Plastic.jpg|una pubblicità]] del 1949 per una sussidiaria dedicata alla produzioni di parti in plastica ad iniezione si proclama una esperienza più che ventennale nel campo.

Still relating to [[1925]] is claimed the creation of an interchangeable nib group, and the production of pens with injection molding plastic parts. There are no clear documentation of these statements but in 1949 advertisement for a subsidiary dedicated to injection molding plastic parts production, there is a claim of more than 20 years experience in the field.

For some time the two brands were produced together; the [[Mentmore]] was transformed into a joint stock company in [[1930]]. The situation at that time is not clear, there are those who reported that the brand [[Mentmore]] has been progressively replaced by [[Platignum]], but by the late '30s to the' 50s, there is a large production of pens with this brand with explicit reference in advertisements to the ''"Mentmore Manufacturing Company"''. Also a patent of 1936 ({{Cite patent|GB|457212}}) explicitly shows the name of ''"Spot Pen Company"'' as the new name of '''Mentmore Manufacturing Company"''. However the ''"Spot Pen"'' name appears in an advertisement for the ''British Industries Fair'' of 1929, while maintaining the reference to the company as ''"Mentmore Manufacturing Company"''. Association with [[Platignum]] brand is established at least until 1951.<ref>thanks to [[:File:1951-Platignum.jpg|this advertisement]].</ref>

For some time the two brands were produced together; the [[Mentmore]] was transformed into a joint stock company in [[1930]]. The situation at that time is not clear, there are those who reported that the brand [[Mentmore]] has been progressively replaced by [[Platignum]], but by the late '30s to the' 50s, there is a large production of pens with this brand with explicit reference in advertisements to the ''"Mentmore Manufacturing Company"''. Also a patent of 1936 ({{Cite patent|GB|457212}}) explicitly shows the name of ''"Spot Pen Company"'' as the new name of '''Mentmore Manufacturing Company"''. However the ''"Spot Pen"'' name appears in an advertisement for the ''British Industries Fair'' of 1929, while maintaining the reference to the company as ''"Mentmore Manufacturing Company"''. Association with [[Platignum]] brand is established at least until 1951.<ref>thanks to [[:File:1951-Platignum.jpg|this advertisement]].</ref>