From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Internal correspondence concerning a potential windscreen defroster patent infringement.
| Identifier | ExFiles\Box 147\2\ scan0224 | |
| Date | 7th February 1940 | |
| Rm.{William Robotham - Chief Engineer} ought not Edwards to point out to Marston that we appear to infringe this patent 100%. Ev.{Ivan Evernden - coachwork} from N.W. c. to Rm.{William Robotham - Chief Engineer} c. to Rm{William Robotham - Chief Engineer}/Mr. Edwards. re: Windscreen Defrosters. ----------- Referring to your Ev{Ivan Evernden - coachwork}4/26.1.40; we send herewith a copy of Clayton Dewandre 514,566. We are not familiar with the details of the arrangements you refer to as well known, but it is noteworthy that this patent covers only the case where the same motor drives two impellors, one for vehicle heating and the other for defrosting the screen one of our heaters was exhibited at the New York Fair on the P.III. N.W. | ||