4. Printing and office machinery
  5. Typewriter or calculator
  6. Calculator

Kurt Christensen

Inventor

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Disk for a menstrual calendar

Printing and office machinery – Typewriter or calculator – Calculator
Patent

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Shutter mechanism for floodlight, with drive

Illumination – Light source and modifier – Adjustable or repositionable modifier
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1102558

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