en.wikipedia.org/wiki/Pen_register

The term pen register originally referred to a device for recording telegraph signals on a strip of paper. Samuel F. B. Morse's 1840 telegraph ...

www.law.cornell.edu/uscode/text/50/1842

the identity of the Federal officer seeking to use the pen register or trap and ... to section 1805(b)(2)(C) [1] of this title, any records concerning the pen register or ...

www.rcfp.org/electronic-communications-surveillance/iii-electronic-communications-surveillance-authorities/elec-1

The so-called “Pen/Trap” statute regulates the collection of non-content information related to electronic communications in real time. Pen registers and trap and ...

www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&Search_String=&URL=0900-0999/0934/Sections/0934.31.html

(1) Except as provided in this section, no person may install or use a pen register or a trap and trace device without first obtaining a court order under s. 934.33.

www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&Search_String=&URL=0900-0999/0934/Sections/0934.33.html

934.33 Issuance of an order for a pen register or a trap and trace device.— ... 934.32(1) has certified to the court that the information likely to be obtained by such ...

www.cdt.org/files/security/000404amending.shtml

For that reason, pen registers and trap and trace devices are very helpful to law .... language on geographic extent already appears in the statute: 3123(b)(1)(C).

law.lis.virginia.gov/vacode/title19.2/chapter6/section19.2-70.2

1. The identity of the officer making the application and the identity of the ... C. Installation and use of a pen register or a trap and trace device shall be authorized ...

www.justice.gov/jm/criminal-resource-manual-1062-unauthorized-installation-or-use-pen-registers-and-trap-and-trace

Unauthorized Installation or Use of Pen Registers and Trap and Trace ... or to protect the property rights of its customers, 18 U.S.C. § 3121(b)(1), or to record the ...

www.washingtonpost.com/news/politics/wp/2018/05/04/the-very-big-difference-between-a-wiretap-and-how-the-feds-tracked-michael-cohen

May 4, 2018 ... There was no wiretap on Cohen's phones, it turns out, but instead NBC was informed that authorities had obtained a “pen register” on Cohen.