I'm working on a 70's style one weight chunky retro font inspired by old scifi type book covers , I would love to add alternates reminiscent of the original Marvin Photo Typeface ( and know I know what a photo typeface is thanks to George Thomas - thanks George!) Particularly a curved leaning A, V and N and M.
Having not really ever ventured into historical font styles - I'm not all to familiar with the ins and outs of what is permitted in terms of not stepping on toes of anyone else who has derived inspiration/developed characters from a particular original style? I know that the original in this case, was 'Marvin' Photo type created in 1969 by London-based Face Photosetting, then In the early 1990s, Thomas E. Harvey did a gigitization named 'Marbold'. The in 2017 'Lodestone' was created by Red Rooster Fonts. And Finally 'Marvin Visions' was created later that same year by Mathieu Triay.
My question is - given that a few renditions ot it have already been made, particularily using a very similar letters in both shape and weight, is it safe to make my own also, without being sued for copyright infringment or the like by one of the latest rendition owners?
Sorry if it's a silly question - but literally very new to all this in terms of deriving inspiration from the past fashions in type and don't want to get into any hot water anywhere along the way. Any advice will be most welcome!