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Do you have the right person? Einstein developed theories about many things including photons and energy quanta; quantized atomic vibrations; the adiabatic principle and action-angle variables; wave–particle duality; the theory of critical opalescence; and zero-point energy, but he is not known as an inventor - though he did work as an assistant examiner in the Swiss Patent Office for a while.

Maths and science discipline smart. "Einstein's researches are, of direction, well chronicled and his extra primary works comprise unique thought of Relativity (1905), Relativity (English translations, 1920 and 1950), basic concept of Relativity (1916), Investigations on idea of Brownian movement (1926), and The Evolution of Physics (1938). Among his non-scientific works, About Zionism (1930), Why warfare? (1933), My Philosophy (1934), and Out of My Later Years (1950) are perhaps the fundamental." Wikipedia so yeah =]

"Einstein Refrigerator" sounds like the name of a quirky rock band.

Nothing except for concepts and therories regarding relatively and quantum energy. He is famous for his equation of E=MC^2.*