Who invented Vacuum Flask?

Who invented Vacuum Flask?
1). Charles Babbage
2). Alexander Fleming
3). Gregory Pincus
4). James Dewar

---

Join Telegram Group

Answer This Question
Name:
Email:
Answer :
Sum of (1+5)
Submit:

Other Questions

1. Who invented the vacuum pump?

2. Electric chair was invented by

3. Who discovered Insulin?

4. Who invented the Lightning Rod in 1749?

5. Who invented radar?

6. Who invented EMail?

7. Who Invented LED?

8. Who Invented PlayStation?

9. Who Invented Electric Stove?

10. Who invented Aerosol can?