Additive Manufacturing (3D Printing)
Additive manufacturing builds objects layer by layer directly from a digital model, rather than cutting away material. It enables complex geometries, rapid prototyping, and on-demand production.
Attribution — Built up over time by many contributors, often across different regions.
Chuck Hull invented stereolithography and the STL format (patented mid-1980s) and is widely credited with 3D printing, but Hideo Kodama published a comparable photopolymer method earlier (1981), and other processes — selective laser sintering (Carl Deckard) and fused deposition (S. Scott Crump) — were developed independently.
What counts as the invention: Several distinct processes (SLA, SLS, FDM) were invented separately; 'additive manufacturing' is an umbrella over parallel inventions.
Contributors
Historical impact
Additive methods accelerated product development and enabled parts that cannot be made by cutting.
Modern relevance
3D printing is now used for prototyping, tooling, aerospace, and medical parts — and complements CNC on the shop floor.
Sources & further reading
Each citation names the publisher and the exact reference title.
- Engineering and Technology History Wiki (ETHW)IEEE / United Engineering Foundation · Professional body
- United States Patent and Trademark Office — patent recordsUSPTO · Government / archive
Direct source link pending editorial verification.