According to a site I found Switzerland lays claim to the following inventions:
- Meringues
- Alphorn (after 1300)
- Amish People (Jakob Ammann, 1693)
- Fondue (1699)
- Symbol "e (Leonhard Euler, 1727/36)
- Bernoulli's law; Kinetic gas theory (Daniel Bernoulli, 1738)
- Symbol "i" (Leonhard Euler, 1777)
- Optical lenses (Pierre-Louis Guinand, around 1810)
- Cough-tablets (Emanuel Wybert for the Golden Pharmacy, Basel, GABA, 1846)
- Red Cross (Jean Henri Dunant, 1864)
- Blue cross (Louis-Lucien Rochat, 1877)
- DNA Desoxyribonucleic Acid (Friedrich Miescher, 1869)
- Bag-soups and soup-spice (Julius Maggi, 1886)
- Swiss Army Knife; later "Victorinox" (Karl Elsener, 1891: Patent 1897)
- Ovomaltine" (Hiking Albert, 1904)
- Cellophane (Jacques Edwin Brandenberger, after 1900; 1908)
- aluminium foil (Company Alusuisse, 1912)
- Ink blot test (Hermann Rorschach, 1921)
- Term Mach number (Jakob Ackeret, 1927)
- Theory of Supernovae (Fritz Zwicky, 1933)
- Cortisone (Tadeus Reichstein, simultaneously with Edward Calvin Kendall, 1936)
- "Nescafé" (Max Morgenthaler, 1938)
- LSD (Albert Hofmann, 1938)
Also if the nation where something is invented gets the credit no matter what the nationality of the inventor we can also lay claim on:
- Soda water (the German Jacob Schweppe in Geneva, 1783)
- Fuel cell (the German Christian Friedrich Schoenbein in Basel, 1838)
- General Theory of Relativity (Albert Einstein, of Ulm, 1905)
- First diesel locomotive (the German Rudolf at Sulzer, 1912; Borsig in Germany 1912)
- LCD-display (the two German physicists Wolfgang Helfrich and Martin Schadt at Roche in Basel, 1968/70)
- WWW (the English Tim Berners-Lee and the Belgian Robert Cailliau, at CERN in Geneva, 1991)