- chemotherapy - Dr Jane Cooke Wright
- computer programmes - Ada Lovelace
- wireless transmission - Hedy Lamarr
- DNA structure - Dr Rosalind Franklin
- sex chromosomes - Dr Nettie Maria Stevens
- Earth's inner core - Inge Lehmann https://twitter.com/HemdevR/status/1303386059506499590?s=19
- caller ID and call waiting - Dr Shirley Ann Jackson
- Space station batteries - Olga D Gonzalez-Sanabria
- Home security system - Marie Van Brittan Brown
- kevlar - Stephanie Kwolek
- Stem cell isolation - Ann Tsukamoto
- dishwasher - Josephine Cochrane
- windscreen wipers - Mary Anderson
- dark matter - Vera Rubin
- nuclear fission - Lise Meitner
- first images of a black hole - Katie Bouman
- exterior fire escapes - Anna Connelly
- non-reflecting glass for lenses - Katherine Blodgett
- Scotchgard - Patsy Sherman
- the Apgar score to assess newborns - Dr Virginia Apgar
- Marine signal flares - Martha Coston
- the circular saw - Tabitha Babbitt
- retractable dog lead - Mary A. Delaney
- Submarine telescope- Sarah Mather
- solar powered house - Maria Telke
- Compiler, COBOL computer language - Admiral Grace Murray Hopper
- Central heating - Alice Parker

That's as big a list as I have time to put together right now, and I'm sure I've missed some "Dr" titles, but feel free to add.
Without women inventors we have no computers, cancer is a death sentence, no idea what causes genetic disease, infant mortality at pre-industrial rates, our homes would be smoky and polluting, the centre of the Earth is a mystery.
No space travel.
No chocolate chip cookies.
You can follow @IdunnSian.
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