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This 1918 letter is a historical artifact that sheds light on harassment of an inventor. The letter discusses an experiment at Mare Island Navy Yard and the obstacles faced by the inventor. The letter belongs to the category of collectibles and paper ephemera from the early 1900s.
Fascinating papers found amongst a cache of documents belonging to Earl C. Hansen, a California inventor (Vacuphone hearing aid and early wireless radio technology).
This letter is signed by Adams (from other documents not included in this sale, we have learned this is Oliver P Adams), as well as Hansen, sent to Mr Brant (which we know is O F Brant of Title Insurance & Trust Company), discussing an angry altercation with what seems to be a government official.
Cool piece!
Wear commensurate to age, including, possibly, chipping at edges, folds, and other minor issues. You get what you see :)
