Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Programmable calculator
Reexamination Certificate
2005-01-04
2008-09-02
Ngo, Chuong D (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Programmable calculator
C033S529000
Reexamination Certificate
active
07421461
ABSTRACT:
A pipe reference and calculating device pipe reference and calculating device includes a housing that can be held in a hand of a user. A processor is contained within the housing. A keypad is on the housing and is electrically connected to the processor. The keypad operates a plurality of switches, each switch controlling a circuit to produce an input signal to the processor for a desired function. A display screen and a memory device are disposed in the housing and are electrically connected to the processor. Software is stored in the memory device. The software causes the processor access data from a database of pipe reference information and data, and formulas, perform pipefitting calculations with data accessed from the database, perform calculations on data input from the keypad, and perform pipefitting and geometric calculations using graphical images with labeled variables.
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