Mining and Ore-Milling Patents

The following list contains the 53 patents Edison received concerning mining and ore milling. It is arranged in chronological order by execution date, which is the date on which Edison signed the application and the date in the patenting process that comes closest to the time of actual inventive activity. The application date is the date on which the Patent Office received and recorded the application; the issue date, the time at which the patent, having passed inspection and any legal challenges, was awarded.

Batteries • Cement • Electric Light & Power • Mining & Ore Milling
Miscellany • Motion Pictures • Phonographs & Sound Recording • Telegraphy & Telephony

No. ExecutedApplied IssuedPatentNo.Title
180.04/03/8004/07/8006/01/80228,329Magnetic Ore-Separator
187.07/26/8008/06/8010/18/81248,432Magnetic Separator
273.06/04/8106/22/8108/22/82263,131Magnetic Ore-Separator
281.08/11/8108/25/8203/26/89400,317Ore-Separator
294.10/04/8108/07/8203/13/83273,715Art of Malleableizing Iron
566.06/30/8707/06/8702/07/88377,518Magnetic Separator
592.03/19/8803/29/8801/15/89396,356Magnetic Separator
597.05/09/8805/21/8806/14/92476,991Method of and Apparatus for Separating Ores
617.09/12/8809/20/8806/17/90430,275Magnetic Separator
618.09/12/8809/20/8805/10/92474,591Process of Extracting Gold from Sulphide Ores
648.07/20/8907/29/8906/17/90430,280Magnetic Separator
653.01/16/9001/20/9008/19/90434,588Magnetic Ore-Separator
655.02/08/9002/17/9012/15/91465,250Process of Extracting Copper Pyrites
705.07/31/9108/24/9112/15/91465,251Method of Bricking Fine Ores
706.07/31/9108/24/9111/08/92485,840Method of Bricking Fine Iron Ores
713.08/28/9110/01/9103/15/92470,929Magnetic Separator
714.08/28/9110/01/9103/22/92471,268Ore-Conveyer and Method of Arranging Ore Thereon
715.08/28/9110/01/9104/05/92472,288Dust-Proof Bearing for Shafts
716.08/28/9110/01/9104/12/92472,752Dust-Proof Journal-Bearing
717.08/28/9110/01/9104/12/92472,753Ore-Screening Apparatus
718.08/28/9110/01/9105/10/92474,592Ore-Conveying Apparatus
719.08/28/9110/01/9105/30/93498,385Roller for Crushing Ore or Other Material
720.08/28/9110/08/9105/10/92474,593Dust-Proof Swivel Shaft-Bearing
722.10/08/9110/15/9106/07/92476,532Ore-Screening Apparatus
725.06/27/9207/02/9207/21/96564,423Process of Separating Ores
726.07/09/9207/20/9211/08/92485,841Method of Magnetically Separating Ores
727.07/09/9207/20/9211/08/92485,842Method of Magnetic-Ore Separation
728.08/24/9208/29/9201/23/94513,096Method of and Apparatus for Mixing Materials
729.03/15/9303/17/9311/28/93509,428Composition Brick and Method of Making Same
731.12/13/9312/19/9309/08/96567,187Crushing-Roll
732.12/13/9312/19/9304/12/98602,064Conveyer
736.05/14/9706/12/9705/28/01675,056Magnetic Separator
737.05/14/9707/16/9711/21/99637,327Rolls
738.05/14/9707/16/9704/23/01672,616Method of Breaking Rock
739.05/14/9707/16/9706/18/01676,618Magnetic Separator
740.06/10/9706/29/9706/14/98605,475Drying Apparatus
741.06/10/9706/29/9706/14/98605,668Mixer
742.06/10/9706/29/9702/05/01667,201Flight Conveyer
743.06/10/9706/29/9704/02/01671,314Lubricating Journal-Bearings
744.06/10/9706/29/9704/02/01671,315Conveyer
745.06/10/9706/29/9705/28/01675,057Apparatus for Screening Pulverized Material
749.04/11/9805/23/9805/08/00648,933Drier
750.04/11/9805/23/9811/06/00661,238Machine for Forming Pulverized Material into Briquets
751.04/11/9805/23/9805/14/01674,057Grinding or Crushing Rolls
752.04/11/9805/23/9807/01/02703,562Apparatus for Bricking Pulverized Material
753.04/11/9805/23/9807/08/02704,010Apparatus for Concentrating Magnetic Iron Ores
755.02/06/9903/17/9905/08/00648,934Process of Screening or Sizing Very Fine Materials
761.06/15/9907/01/9905/05/03727,116Grinding-Rolls
766.01/03/0001/09/0006/18/01676,840Magnetic Separating Apparatus
779.06/11/0006/21/0005/10/04759,358Magnetic Separating Apparatus
780.06/11/0007/02/0006/18/01676,841Magnetic Separating Apparatus
825.05/25/0305/29/0303/15/04754,756Process of Separating Ores from Magnetic Gangue
1007.05/21/1205/23/1201/11/161,167,638Means for Concentrating Ores
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