UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) Commission File Number: 001-34816 TECHNICAL COMMUNICATIONS CORPORATION (Exact name of registrant as specified in its charter) Massachusetts 04-2295040 (State or other jurisdiction of incorporation or organization) 100 Domino Drive, Concord, MA 01742-2892 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (978) 287-5100 N/A (Former name, former address and former fis ...

(Mark One) ☒ Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 25, 2023 ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q Commission File Number: 001-34816 TECHNICAL COMMUNICATIONS CORPORATION (Exact name of registrant as specified in its charter) Massachusetts 04-2295040 (State or ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) ☒ Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended December 24, 2022 ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from ________________ to ________________ Commission File Number: 001-34816 TECHNICAL COMMUNICATIONS CORPORATION (Exact name of registrant as specified in its charte ...