Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,048,311	$ 550,135
Marketable securities	6,867,516	7,622,196
Accounts receivable, net of allowance for doubtful accounts of $21,178 in 2019 and $16,895 in 2018	2,098,411	1,672,567
Inventories(net)	1,217,277	1,482,151
Prepaid expenses and other current assets	170,466	159,364
Prepaid income taxes	165,300	200,687
Total current assets	11,567,281	11,687,100
Property, plant, and equipment:
Land	69,000	69,000
Factory equipment and fixtures	4,482,236	4,406,174
Building and improvements	2,839,289	2,801,582
Total property, plant and equipment	7,390,525	7,276,756
Less accumulated depreciation	6,609,818	6,448,831
Total property, plant, and equipment, net	780,707	827,925
Other assets (net)	14,824	29,647
TOTAL ASSETS	12,362,812	12,544,672
Current liabilities:
Accounts payable	71,385	186,797
Accrued expenses	1,129,126	1,040,635
Dividends payable	142,548	138,719
Total current liabilities	1,343,059	1,366,151
Deferred income taxes (net)	386,855	253,583
Commitments and contingencies
Stockholders’ equity:
Common stock, $.10 par value; 10,000,000 shares authorized; 4,594,319 shares issued and outstanding at December 31, 2019 and 2018, respectively	459,432	459,432
Retained earnings	10,173,466	10,465,506
Total stockholders’ equity	10,632,898	10,924,938
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 12,362,812	$ 12,544,672