Technical Assessment of Patents Related to Underground Coal Mine Haulage. Appendix, Volume 2. Rail Haulage

摘要

In this program over 67,000 patents were covered in four (4) classes: 105-Railway Rolling Stock, 198-Conveyors, Power-Driven, 238-Railways, Surface Track, 299-Mining or In Situ Disintegration of Hard Material. Of these 17,351 patents were examined and 515 detailed evaluations prepared. Brief descriptions of these patents are given in the report. The complete evaluations are presented in the Appendix. The report also presents concepts worthy of further consideration, and recommendations are given for other classes that should be reviewed. (ERA citation 06:000151)