Abstract: The present invention generally relates to a writing instrument that includes a means for calculating the result of specific a non-linear equation, such as the Body Mass Index (BMI) of a person or the energy developed by a falling object. The present invention is a writing instrument which combines a writing instrument with a calculating device in one lightweight and commonly used type of device, thereby freeing the user of the need to refer to complicated charts or other technical materials. The writing implement has a first end which includes the writing tip portion and a second end which includes the tables and operational elements used to calculate a particular formula based on user specified numerical values.

Abstract: A clip assembly securably affixable to the body of a variety of hand-held implements, including writing devices, which is capable of clasping objects substantially thicker that a garment pocket, such as notepads, books, and backpacks. The clip assembly comprises a pin securably engaged to the body of the hand-held implement, a rigid member having a first end for clasping an article, and a second end for manually operating the clip assembly, and a spring biasing the first end of the rigid member towards the body of said hand-held writing implement. The rigid member operably engages the pin in a manner that permits the rigid member to rotate relative to the body of the hand-held implement when a yielding pressure is applied to the second end of the rigid member.