Inventories (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Inventories
Raw Materials	$ 493,405	$ 325,251
Work-in Progress	221,487	129,882
Finished Goods	156,606	128,479
Engineering Models	3,726	3,726
Subtotal	875,224	587,338
Less: Reserve for Obsolescence	(69,000)	(70,000)
Total	$ 806,224	$ 517,338

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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