1. As further evidence of their fundamental nature, De Lodyguine's patents were the key prior art considered in GE's patent infringement suits that asserted its basic tungsten lamp patents;Appendix B2)
2. Aylsworth describes the use of carbon or platinum as cores for the deposition process, permitting in the latter case the construction of non-carbon metallic filament. Although Aylsworth's attempts to manufacture niobium filaments 138 using his CVD process had apparently met with no commercial success, at least 17 downstream references cite his patents as pioneer prior art (Table 3 and Appendix B2);1894 the chemist Jonas W. Aylsworth independently pioneered a Chemical Vapor Deposition (CVD) process for coating filament cores with the metals niobium, tantalum, molybdenum, titanium or zirconium. On