3D Systems' is a technology innovator. 3D Systems holds more than 175 U.S. and foreign patents, with additional patents pending. A tightly integrated combination of hardware, software and part-making materials gives 3D Systems the broadest family of solid imaging solutions in the marketplace today. U.S. Patent #4929402 Method for production of three-dimensional objects by stereolithography U.S. Patent #4996010 Methods and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #4999143 Methods and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5015424 Methods and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5096530 Resin film recoating method and apparatus U.S. Patent #5104592 Method of and apparatus for production of three-dimensional objects by stereolithography with reduced curl U.S. Patent #5130064 Method of making a three dimensional object by stereolithography U.S. Patent #5133987 Stereolithographic apparatus and method U.S. Patent #5141680 Thermal stereolithography U.S. Patent #5143663 Stereolithography method and apparatus U.S. Patent #5164128 Methods for curing partially polymerized parts U.S. Patent #5174931 Method of and apparatus for making a three-dimensional product by stereolithography U.S. Patent #5174943 Method for production of three-dimensional objects by stereolithography U.S. Patent #5182055 Method of making a three-dimensional object by stereolithography U.S. Patent #5182056 Stereolithography method and apparatus employing various penetration depths U.S. Patent #5182715 Rapid and accurate production of stereolithographic parts U.S. Patent #5184307 Method and apparatus for production of high resolution three-dimensional objects by stereolithography U.S. Patent #5192469 Simultaneous multiple layer curing in stereolithography U.S. Patent #5209878 Surface resolution in three-dimensional objects by inclusion of thin fill layers U.S. Patent #5238639 Method and apparatus for stereolithographic curl balancing U.S. Patent #5248456 Method and apparatus for cleaning stereolithographically produced objects U.S. Patent #5256340 Method of making a three-dimensional object by stereolithography U.S. Patent #5258146 Method of and apparatus for measuring and controlling fluid level in stereolithography U.S. Patent #5273691 Stereolithographic curl reduction U.S. Patent #5321622 Boolean layer comparison slice U.S. Patent #5344298 Apparatus for making three-dimensional objects by stereolithography U.S. Patent #5345391 Method and apparatus for production of high resolution three-dimensional objects by stereolithography U.S. Patent #5358673 Applicator device and method for dispensing a liquid medium in a laser modeling machine U.S. Patent #5447822 Apparatus and related method for forming a substantially flat stereolithographic working surface U.S. Patent #5481470 Boolean layer comparison slice U.S. Patent #5495328 Apparatus and method for calibrating and normalizing a stereolithographic apparatus U.S. Patent #5501824 Thermal stereolithography U.S. Patent #5554336 Method and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5556590 Apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5569349 Thermal stereolithography U.S. Patent #5569431 Method and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5571471 Method of production of three-dimensional objects by stereolithography U.S. Patent #5573722 Method and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5609812 Method of making a three-dimensional object by stereolithography U.S. Patent #5609813 Method of making a three-dimensional object by stereolithography U.S. Patent #5610824 Rapid and accurate production of stereolithographic parts U.S. Patent #5630981 Method for production of three-dimensional objects by stereolithography U.S. Patent #5637169 Method of building three dimensional objects with sheets U.S. Patent #5651934 Recoating of stereolithographic layers U.S. Patent #5665401 Apparatus for producing an object using stereolithography U.S. Patent #5667820 Apparatus for making a solid three-dimensional article from a liquid medium U.S. Patent #5672312 Thermal stereolithography U.S. Patent #5676904 Thermal stereolithography U.S. Patent #5688464 Vibrationally enhanced stereolithographic recoating U.S. Patent #5693144 Vibrationally enhanced stereolithographic recoating U.S. Patent #5695707 Thermal stereolithography U.S. Patent #5711911 Method of and apparatus for making a three-dimensional object by stereolithography U.S. Patent #5776409 Thermal stereolithograph using slice techniques U.S. Patent #5779967 Method and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5814265 Method and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5840239 Apparatus and method for forming three-dimensional objects in stereolithography utilizing a laser exposure system having a diode pumped frequency quadrupled solid state laser U.S. Patent #5854748 Boolean layer comparison slice U.S. Patent #5855718 Method of and apparatus for making partially solidified three-dimensional objects on a layer-by-layer basis from a solidifiable medium U.S. Patent #5855836 Method for selective deposition modeling U.S. Patent #5870307 Method and apparatus for production of high resolution three-dimensional objects by stereolithography U.S. Patent #5885511 Method of making a solid three-dimensional article from a liquid medium U.S. Patent #4575330 Apparatus for production of three-dimensional objects by stereolithography U.S. Patent #4992806 Method of jetting phase change ink U.S. Patent #5058988 Apparatus and method for profiling a beam U.S. Patent #5059021 Apparatus and method for correcting for drift in production of objects by stereolithography U.S. Patent #5059359 Methods and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5071337 Apparatus for forming a solid three-dimensional article from a liquid medium U.S. Patent #5076974 Methods of curing partially polymerized parts U.S. Patent #5123734 Apparatus and method for calibrating and normalizing a stereolithographic apparatus U.S. Patent #5137662 Method and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5192559 Apparatus for building three-dimensional objects with sheets U.S. Patent #5234636 Methods of coating stereolithographic parts U.S. Patent #5236637 Method of and apparatus for production of three dimensional objects by stereolithography U.S. Patent #5267013 Apparatus and method for profiling a beam U.S. Patent #5313232 Method of jetting phase change ink U.S. Patent #5460758 Method and apparatus for production of a three-dimensional object U.S. Patent #5582876 Stereographic apparatus and method U.S. Patent #5597520 Simultaneous multiple layer curing in stereolithography U.S. Patent #5762856 Method for production of three-dimensional objects by stereolithography U.S. Patent #5772947 Stereolithographic curl reduction U.S. Patent #5785918 Method and apparatus for production of three-dimensional objects by stereolithography U.S. Patent #5891382 Recoating of stereolithographic layers U.S. Patent #5897825 Method for producing a three-dimensional object U.S. Patent #5902537 Rapid recoating of three-dimensional objects formed on a cross-sectional basis U.S. Patent #5902538 Simplified stereolithographic object formation methods of overcoming minimum recoating depth limitations U.S. Patent #5904889 Apparatus and method for producing an object using stereolithography U.S. Patent #5943235 Rapid prototyping system and method with support region data processing U.S. Patent #5945058 Method and apparatus for identifying surface features associated with selected lamina of a three-dimensional object being stereolithographically formed U.S. Patent #5965079 Method and apparatus for making a three-dimensional object by stereolithography U.S. Patent #5989476 Process of making a molded refractory article U.S. Patent #5997291 Hot-melt material for heating plate U.S. Patent #5999184 Simultaneous multiple layer curing in stereolithography U.S. Patent #6001297 Method for controlling exposure of a solidfiable medium using a pulsed radiation source in building a three-dimensional object using stereolithography