works · updated 2026-08-01
US Patent 256,482
volatility: cold
A. & A. Iske's 1882 gravity heat-engine patent, the earliest version of the recurring bubble-wheel design Baer traced at the US Patent Office in 1973.
A. & A. Iske’s 1882 gravity heat-engine patent, the earliest version of the recurring bubble-wheel design Baer traced at the US Patent Office in 1973.