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Egon Graf builds an elec­tric mo­tor­bike
  • Com­pa­ny found­ed by Egon Graf in Ehnin­gen near Böblin­gen
  • Ca­pac­i­tors for ra­dios
  • AC ca­pac­i­tors for elec­tric mo­tors
  • TES­LA trans­form­ers
Starter ca­pac­i­tors for flu­o­res­cent tubes
De­vel­op­ment and con­struc­tion of:
  • High volt­age ca­pac­i­tors
  • High volt­age gen­er­a­tors
  • High volt­age trans­form­ers
  • High volt­age con­trol de­vices
  • High volt­age ca­pac­i­tors for elec­tron mi­cro­scopes
  • De­vel­op­ment and con­struc­tion of 100 KV tubu­lar elec­tro­stat­ic air fil­ters
  • High volt­age trans­form­ers for den­tal X-ray equip­ment
  • High volt­age test in­stru­ments for vi­tal­i­ty test­ing in den­tistry
  • De­vel­op­ment and con­struc­tion of a mag­ne­tother­a­py de­vice
  • Portable high volt­age gen­er­a­tor for an "elec­tric paint­brush"
Since 1983
  • In­ven­tion of the in­te­grat­ed cas­cade
  • De­vel­op­ment of HV-Gen­er­a­tor NQ 85 with in­te­grat­ed tubu­lar cas­cade
  • De­vel­op­ment of HV-Gen­er­a­tor HG 85 with in­te­grat­ed tubu­lar cas­cade
  • De­vel­op­ment of a ca­pac­i­tor com­bi­na­tion for Zeiss
  • De­vel­op­ment of the HEX-Se­ries with pow­er board
Start of mass pro­duc­tion of the first small-scale gen­er­a­tors with medi­um fre­quen­cy tech­nol­o­gy
Busi­ness tak­en o­ver by Har­ry Graf, the founder's son
Mod­u­lar­i­sa­tion of the HV gen­er­a­tor mod­els
De­vel­op­ment of the sta­bi­lized gen­er­a­tor se­ries GE 101
  • De­vel­op­ment of par­tial-dis­charge-free trans­form­ers
    • HV-Trans­former HT 40
    • HV-Trans­former HT 50
De­vel­op­ment of HV-Gen­er­a­tor GE 32 with 20 mA in­ter­face
  • Start of mass pro­duc­tion of minia­turised high volt­age gen­er­a­tors for paint­ing robots in the au­to­mo­tive in­dus­try De­vel­op­ments since 2002:
    • HV-Gen­er­a­tor GE 200
      (100 KV/200 W)
    • HV-Gen­er­a­tor GE 400
      (100 KV/400 W)
    • HV-Gen­er­a­tor GE 9P RO2
      (100 KV/ 9 W)
    • Pow­er Board R 101-36 ST
    • Pow­er Board R 101-36 DB
    • Pow­er Board R 101-36 X3
    • Pow­er-Mul­ti­pli­ca­tion of cur­rent by join­ing two or more gen­er­a­tors
    • HV-Switch HUS 101
De­vel­op­ment of quick switch­ing high volt­age switch­es HDS 90 REE and HUS 90 REE for test­ing pur­pos­es.
De­vel­op­ment of a mea­sure­ment de­vice ADOS 100 A to mea­sure rapid volt­age changes at high volt­age po­ten­tial for dis­play on an os­cil­lo­graph
De­vel­op­ment of mul­ti­ple gen­er­a­tors for high­er cur­rents with sup­ply and con­trol boards