1. Beaman JJ, Deckard CR: ‘Selective laser sintering with assisted powder handling’, US patent no. 4938816, 1990.
2. Bourell DL, Marcus HL, Barlow JW, Beaman JJ, Deckard CR: ‘Multiple material systems for selective beam sintering’, US patent no. 5076869, 1991.
3. Koch J, Mazumder J: ‘Apparatus and methods for monitoring and controlling multi-layer laser cladding’, US patent no. 6122564, 2000.
4. Additive Manufacturing Technologies
5. Rapid Prototyping