David Caldwell

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Lubbock, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Electronic data processing apparatus with equation operating system...
- Patent number 4,521,868
- Issue date Jun 4, 1985
- Texas Instruments Incorporated
- David Caldwell
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Electronic data processing apparatus with equation operating system...
- Patent number 4,519,045
- Issue date May 21, 1985
- Texas Instruments Incorporated
- David Caldwell
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method of entering and performing operations on complex numbers on...
- Patent number 4,511,987
- Issue date Apr 16, 1985
- Texas Instruments Incorporated
- David Caldwell
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Electronic data processing apparatus with equation operating system...
- Patent number 4,495,592
- Issue date Jan 22, 1985
- Texas Instruments Incorporated
- David Caldwell
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Data processing apparatus with algebraic memory operation and entry...
- Patent number 4,473,886
- Issue date Sep 25, 1984
- Texas Instruments Incorporated
- Samir W. Rizk
- G06 - COMPUTING CALCULATING COUNTING